FitSugar

FREE Sample Alert: Alavert Allergy Medication

FitSugar — Tue, 17 Apr 2007 02:30:00 -0700

It's FREE sample alert time again and this time it's allergy medication. I'd say it's very appropriate since this is one of the worst allergy seasons ever.

Alavert, the makers of the quick-dissolving tablets that melt in your mouth and provide non-drowsy, 24-hour allergy relief are offering FREE samples right now. They come in two flavors - Original Mint and Citrus Burst. Personally, I like to keep some form of allergy relief in my purse in case I have a run in with a cat (or blossoming tree for that matter) -- Sample sized Alavert tabs are perfect for just that, especially since water is not needed to take Alavert.

To get your free samples, just visit here and fill out the information along with answering two questions on your current allergy medication preference. It's super quick, I promise.

Singulair Linked to Suicide?

FitSugar — Mon, 31 Mar 2008 02:00:00 -0700

If you take the allergy and asthma medication Singulair (which I do, by the way), you'll want to know that the FDA is investigating its link to depression and suicidal tendencies. Used by both children and adults, possible side effects can also include tremors and anxiety. It's been reported that at least three people who were taking Singulair have committed suicide.

Neither the FDA nor Merck (the makers of this drug) recommend that you stop taking it, unless you have noticed severe mood changes or other symptoms. Talk to your doctor if you have any concerns.

If you want to see a video with more information then read more

Are Remote-Controlled Pills in Our Future?

FitSugar — Tue, 20 Nov 2007 07:30:00 -0800

Yes they are!

Philips, the electronics company, has designed a remote-controlled pill to help solve the problem of faulty time released medications already in use. Basically, it will be a little capsule that has a reservoir inside it (see 144 in the diagram) that holds the medicine. You can control a valve in the capsule with an external remote control, so it releases the medicine when you want to. External factors such as a rise in pollen count, or a rise in a patient's blood pressure will also be able to trigger the medicine's release too. What's more? The pills will also be able to hold several kinds of medications, so you only have to take one pill a day.

Phillips plans that the remote-controlled pills will be inexpensive and disposable, so they won't need to be collected and recycled after each use.

Very cool, but is this sounding a lot like a plot from the movie Innerspace to anyone else?

Source

Allergic rhinitis

FitSugar — Wed, 08 Oct 2008 17:35:27 -0700

In This Report

Highlights
Introduction
Causes
Symptoms
Risk Factors
Prognosis
Diagnosis
Treatment
Other Treatments
Decongestants
Antihistamines
Corticosteroids
Immunotherapy
Prevention
Resources
References

HEALTH GUIDE REFERENCE FROM A.D.A.M

Highlights

Drug Approval

Ciclesonide (Omanaris), a corticosteroid nasal spray, has been approved for treatment of seasonal and perennial allergic rhinitis (hay fever) in adults and children age 12 years and older.

FDA Drug Warnings

The antihistamine promethazine (Phenergan) should not be given to children younger than age 2 because it may cause serious breathing problems.
Omalizumab (Xolair) may cause a life-threatening allergic reaction (anaphylaxis). This drug is used to treat allergy-related asthma, but is also being investigated as an allergy treatment.

Cough and Cold Medicines for Children

In 2007, the FDA began reviewing the safety and effectiveness of cough and cold medicines for children. These medicines contain antihistamines, decongestants, expectorants, and cough suppressants. The FDA is particularly concerned about the use of these medicines in children younger than 2 years of age. Overdoses can cause serious heart problems and death. However, many experts are concerned that the currently recommended dosages are themselves not safe.

Immunotherapy (Allergy Shots)

Immunotherapy is safe and effective for patients with allergic rhinitis, particularly those who have not been helped by other treatments, indicates a 2007 review in the Cochrane Database.
An experimental DNA-based ragweed vaccine is showing promise in early clinical trials. In a 2006 pilot study published in the New England Journal of Medicine, six weekly injections of the vaccine helped improve symptoms with benefits lasting into the following ragweed season.

Allergic Rhinitis and Sleep

Allergic rhinitis can cause sleep disorders and interfere with sleep quality, indicates a 2006 study in the Archives of Internal Medicine. In the study of nearly 600 patients with allergic rhinitis, patients with severe allergic rhinitis experienced worse sleep problems than those with mild allergic rhinitis.

Allergic Rhinitis and Parkinson’s Disease

Allergic rhinitis may be associated with the later development of the neurological disorder Parkinson’s disease, suggests a 2006 study in Neurology. Both conditions are associated with an inflammatory response.

Introduction

The nose is separated into two passages by a wall of cartilage called the septum. The nasal passages are lined with a membrane that produces a clear liquid called mucus. Mucus is a one of the body's defense systems:

The mucus traps small particles and bacteria, which may enter the nose as a person breathes.
The trapped bacteria usually do not cause harm in healthy individuals.
However, the bacteria can lead to a daily cycle of congestion and decongestion.
When one side of the nose is congested, air passes through the open (decongested) side. The sides alternate between being wide-open and partly or completely blocked.

If the congestion becomes severe or other changes occur that irritate the nasal passage, rhinitis develops. To be diagnosed with rhinitis, the patient must experience at least two of the following symptoms for an hour or more on most days:

Runny nose
Obstruction in the nasal passage
Nasal itching
Sneezing

Click the icon to see an image showing symptoms of allergic rhinitis.

These symptoms may occur as a result of colds or environmental irritants, such as allergens, cigarette smoke, chemicals, changes in temperature, stress, exercise, or other factors.

Infectious Rhinitis. If symptoms last less than 6 weeks, the condition is referred to as acute rhinitis and is usually caused by a cold or infection, or temporary overexposure to environmental chemicals or pollutants. [See In-Depth Report #94: Colds and the flu.]

Chronic Rhinitis. When rhinitis lasts for a longer period, the condition is called chronic rhinitis. Allergies are often the cause, but structural problems or chronic infections could also be to blame.

Aging Process. The elderly are at risk for chronic rhinitis as the mucous membranes become dry with age. In addition, the cartilage supporting the nasal passages weakens, causing changes in airflow. In such cases, therapy involves avoiding possible allergens and airborne irritants as well as measures to keep the nasal passages moist. Decongestants are not helpful.

Irritative Rhinitis. Irritative rhinitis is caused by an overreaction to irritants, such as cigarette smoke, dozens of other air pollutants, strong odors, alcoholic beverages, and exposure to cold. The nasal passages become red and engorged. This reaction is not the same as an allergic reaction, although both are associated with increased numbers of white blood cells called eosinophils.

Vasomotor Rhinitis. Vasomotor rhinitis, also sometimes called idiopathic or irritant rhinitis, is congestion and stuffy nose that is produced by the changes in blood vessels and nerve cells in the nasal passages. It occurs in response to irritants, including smoke, environmental toxins, changes in temperature and humidity, stress, and even sexual arousal. This over-reaction is not associated with any immune response. The biologic causes are unknown. Some research has found an association between vasomotor rhinitis and gastroesophageal reflux disorder (GERD, a common cause of heartburn), which some experts think may be due to a common defect in the nervous system that controls muscle action. Symptoms of vasomotor rhinitis are similar to most of those caused by allergies. Usually, however, they are more severe and occur predominantly on one side of the nose.

Foreign Objects. Blockage in young children is very often caused by foreign objects that they have pushed up their nose. If they are left in place, they may eventually cause infection and nasal discharge, (usually in one side of the nose), which may be yellow or green and foul smelling.

Blockage in the Nose from Polyps or Structural Abnormalities. A number of conditions may block the nasal passages. Surgery may be helpful for certain cases.

Polyps. These are soft, gray, fluid-filled sacs that develop off stalk-like structures on the mucus membrane. They impede mucus drainage and restrict airflow. Polyps usually develop from sinus infections that cause overgrowth of the mucus membrane in the nose. They do not regress on their own and may multiply and cause considerable obstruction.
Deviated Septum. A common structural abnormality that causes rhinitis is a deviated septum. The septum is the inner wall of cartilage and bone that separates the two sides of the nose. When deviated, it is not straight but shifted to one side, usually the left.
Other Causes of Blockage. Rarely, cleft palates, overgrowth of bones in the nose, or tumors cause rhinitis.

Nonallergic Rhinitis in Children. Chronic nasal congestion in children often accompanies a susceptibility to ear, sinus, or adenoid infections. Adenoids are spongy tissue masses located between ends of the nasal passages and the soft tissue in the back of the throat. Enlarged adenoids may also cause ear problems. The bacteria that cause these other infections, however, are not usually the cause of this chronic rhinitis.

Medications and Illegal Drugs. A number of drugs can cause rhinitis or worsen it in people with conditions such as deviated septum, allergies, or vasomotor rhinitis:

Overuse of decongestant sprays used to treat nasal congestion can, over time (3 - 5 days) cause inflammation in the nasal passages and worsen rhinitis.
Many people with allergies and asthma are sensitive to common painkillers known as nonsteroidal anti-inflammatory drugs (NSAIDs). These include aspirin, ibuprofen (Motrin, Advil, Nuprin, Rufen), and naproxen (Aleve), among many others. Aspirin and products containing aspirin can even cause life-threatening asthma attacks in some highly susceptible individuals. NSAIDs vary, however, and some patients may not have a reaction to all of them. For minor pain, acetaminophen (Tylenol), which is not an NSAID, is usually recommended for patients with intolerance to NSAIDs. A pharmacist should be consulted if the ingredients of any over-the-counter preparations are not known.
Other medications that may cause rhinitis include oral contraceptives, hormone replacement therapy, anti-anxiety drugs (particularly alprazolam), some antidepressants, and some blood pressure medications, including beta-blockers and vasodilators.
Sniffing cocaine damages nasal passages and can cause chronic rhinitis.

Estrogen in Women. Elevated levels of estrogen appear to increase mucus production and swelling in the nasal passages and can cause congestion. This effect is most apparent in women during pregnancy. In such cases the condition usually clears up after delivery. Oral contraceptives and hormone replacement therapies that contain estrogen have also been associated with nasal congestion in some women.

Medical Conditions. Hypothyroidism is associated with chronic rhinitis. People with certain genetic or other medical conditions that specifically affect the mucous membranes are at also risk, although rhinitis in such people is apt to be only one of many more serious conditions, including chronic sinusitis and respiratory problems. Wegener's granulomatosis, for example, is a serious but very rare illness that causes long-term swelling and tumor-like masses in air passages.

Rare genetic disorders that cause chronic rhinitis include the following:

Cystic fibrosis, in which the mucus is very thick.
Kartagener's syndrome. With this condition the body's major internal organs are located in the mirror-image position of their normal location. In addition, the body's cilia (hair-like-projections on many body tissues that help to move mucus and other fluids) are impaired or motionless.

In both disorders, mucus build-up also produces an environment favorable to infection-causing organisms.

Click the icon to see an image of a deviated septum.

Click the icon to see an image of the adenoids.

Causes

The allergic process, called atopy, and its connection to asthma is not completely understood. It involves various airborne allergens or other triggers that set off a cascade of events in the immune system leading to inflammation and hyperreactivity in the airways.

The conductor in an orchestra of immune factors that contribute to allergies and asthma appears to be a category of white blood cells known as helper T cells, in particular a subgroup called Th2 cells.
Th2 cells overproduce interleukins (ILs), immune factors that are molecular members of a family called cytokines, which are involved in the inflammatory process.

Interleukins 4, 9, and 13 may be responsible for a first-phase asthma attack. These interleukins stimulate the production and release of antibody groups known as immunoglobulin E (IgE). People with both asthma and allergies appear to have a genetic predisposition for overproducing IgE.
During an allergic attack, these IgE antibodies bind to special cells in the immune system called mast cells, which are generally concentrated in the lungs, skin, and mucous membranes. This bond triggers the release of a number of active chemicals, importantly potent molecules known as leukotrienes. These chemicals cause airway spasms, overproduce mucus, and activate nerve endings in the airway lining.
Another cytokine, interleukin 5, appears to contribute to a late-phase inflammatory response. This interleukin attracts white blood cells known as eosinophils. These cells accumulate and remain in the airways after the first attack. They persist for weeks and mediate the release of other damaging particles that remain in the airways.

One theory blames the dramatic increase in asthma and allergies on the reductions in childhood infections that have occurred with modern hygiene and antibiotic use. The basic theory rests on the idea that infections stimulate production of specific immune factors called Th1 cells. As these cells build up, they replace other immune factors called Th2 cells, which react to allergens -- a less serious threat to the body. Without infections to stimulate the production of the Th1 infection fighters, the Th2 allergen fighters are not replaced, and they persist at high levels, making the growing child more susceptible to allergies and asthma.

A number of different studies support this theory:

Some studies suggest that being part of a large family or attending day care increases the risk for early respiratory infections but reduces the risk of childhood asthma. The occasional cold, then, may be protective.
In a 2002 study, researchers measured levels of bacterial byproducts called endotoxins in the mattress dust of 812 children. Those with the highest levels had an 80% lower rate in allergies and asthma.
Another study further found a strong association between allergy development and the absence of certain beneficial bacteria (called probiotics) in infants' intestines. Infants who were born in more hygienic environments tended to lack these bacteria. Antibiotic overuse and modern hygiene may reduce these helpful organisms. (Probiotics are available in active yogurt cultures and in supplements, which are being studied for protection.)

According to many studies, the standard vaccinations against serious childhood infections pose no risk for developing asthma or hay fever. Some studies have even reported lower risk for asthma and allergies in the second and third years after vaccinations.

Some evidence suggests that the increase in allergies and asthma may be due to overexposure to indoor allergens. These may include wall-to-wall carpeting, cats, and mold produced by dampness in homes. Children who spend hours indoor each day may become overexposed to indoor allergens. This exposure is intensified by the recent trend of making homes more energy-efficient, which may result in more dust mites being trapped inside. However, other studies suggest that early exposure to allergens may actually prevent the development of allergies in children.

Seasonal allergic rhinitis occurs only during periods of intense airborne pollen or spores. It is commonly, although inaccurately, called hay fever or rose fever, depending on whether it occurs in the late summer or spring. No fever accompanies this condition, and the allergic response is not dependent on either hay or roses. In general, triggers of seasonal allergy in the U.S. include:

Ragweed. Ragweed is the most dominant cause of allergic rhinitis in the U.S., affecting about 75% of allergy sufferers. One plant can release 1 million pollen grains a day. Ragweed occurs everywhere in the U.S., although it is less common in western coastal states, southern Florida, northern Maine, Alaska, and Hawaii. The effects of ragweed in the northern states are first felt in middle to late August and last until the first frost. Ragweed allergies tend to be most severe before midday.
Grasses. Grasses affect people in mid-May to late June. Grass allergies are experienced more in the late afternoon.
Tree Pollen. Small pollen grains from certain trees usually produce symptoms in late March and early April.
Mold Spores. Mold spores that grow on dead leaves and release spores into the air are common allergens throughout the spring, summer and fall. Mold spores may peak on dry windy afternoons or on damp or rainy days in the early morning.

Click the icon to see an animation about allergies.

Major weather changes, such as El Nino, can affect the timing of allergy seasons. For example, in 1998, when the effects of El Nino were very strong, allergy attacks were markedly increased, and maximum tree pollen counts occurred 2 - 4 weeks earlier and mold counts 2 - 3 months earlier than the previous year.

Allergens in the House. Allergens in the house can trigger attacks in people with year-long allergic rhinitis, called perennial rhinitis. Household allergens may include the following:

House dust and mites. Dust mites, specifically mite feces, are coated with enzymes that contain a powerful allergen.
Cockroaches
Pet dander
Molds growing on wallpaper, house plants, carpeting, and upholstery

However, some studies are suggest that early exposure to some of these allergens, including dust mites and pets, may prevent allergies from developing in the first place in children.

Fossil Fuels. There may be an association between traffic-related air pollution and allergic rhinitis. Some experts believe that refined fossil fuels, such as diesel fuel and particularly kerosene, are important triggers for allergic rhinitis. In people who already have allergies or asthma, exposure to such fossil fuels may worsen symptoms.

Symptoms

The general symptoms of rhinitis are congestion, runny nose, and postnasal drip, in which mucous drips into the throat from the back of the nasal passage, especially when lying on the back. Symptoms may vary depending on the cause of rhinitis. Symptoms of influenza and sinusitis must also be differentiated from allergies and colds.

Symptoms of allergic rhinitis occur in two phases, early and late.

Early Phase Symptoms. The early phase occurs within minutes of exposure to the allergens and includes:

Runny nose
Frequent or repetitive sneezing
Itching in the nose, eyes, throat, or roof of the mouth

Late-Phase Symptoms. The late phase occurs 4 - 8 hours later and may include one or more of these symptoms:

Nasal congestion and possibly plugged ears. Children may push their nose upward with the palm of their hand or twitch their nose rabbit-like to clear the obstruction.
Fatigue.
Mental changes can include irritability, a slight decrease in attention span, worsened memory, and slower thinking.
Other common physical symptoms include a decreased sense of smell, plugged ears, sinus headache, postnasal drip or some combination. In severe allergies, dark circles may develop under the eye. The lower eyelid may be puffy and lined with creases.

Risk Factors

Allergic rhinitis affects between 20 - 40 million Americans of all ages. As with asthma and many upper respiratory infections, the incidence in allergic rhinitis is increasing. Allergies most often appear first in childhood, and allergic rhinitis is the most common chronic condition in childhood, although it can develop at any age. About 20% of allergic rhinitis cases are due to seasonal allergies, 40% to perennial (chronic) rhinitis, and the rest are mixed.

Genetic factors are the major determinants of allergies.

If both parents have an allergy, the child's risk is 75%.
If one parent is allergic, the child's risk is 50%.

Having other allergies increases the risk for allergic rhinitis. Here are some examples:

Young children who have eczema (an allergic skin reaction) have a later risk for allergic rhinitis and asthma. In fact, a family history of eczema increases the risk.
Food allergies are associated with allergic rhinitis and asthma. (Early feeding patterns, time of weaning, and introduction of solid food do not appear to affect this risk.)
Asthma, especially in patients who develop it as adults, may increase allergic sensitivity to ragweed and other allergens. Patients who have asthma and a genetic tendency towards allergies (atopy) are also at risk for rhinitis.

Birth Month. Some studies report a higher risk of allergies and asthma in children born in winter months and lower risk in those born during the summer.

Breastfeeding. Some researchers suggest that the dramatic increase in asthma and allergies may be due to fewer women breastfeeding their infants. In a number of studies, breastfeeding has been associated with a lower risk for allergies and asthma -- at least until age 2. Breastfeeding can also help prevent other upper respiratory infections. The American Academy of Pediatrics recommends feeding infants exclusively breast milk for the first 6 months of life.

Prognosis

Seasonal allergic rhinitis tends to diminish as a person ages. The earlier the symptoms start, the greater the chances for improvement. People who develop hay fever in early childhood tend not to have the allergy in adulthood. In one study, over half of allergic subjects reported that by 40 years of age their symptoms had decreased, and a quarter were symptom-free. In some cases, allergies go into remission for years and then return later in life. People who develop allergies after age 20, however, tend to continue to have hay fever at least into middle age.

People with allergic rhinitis may be at higher risk for other allergies, including potentially serious food or latex allergies.

Although allergic rhinitis is not considered a serious condition, it nonetheless can interfere with many important aspects of life. A 2006 survey of nasal allergy sufferers reported that symptoms made patients feel tired (80%), miserable (65%), irritable (62%), and interfered with work performance (52%).

People with allergic rhinitis, particularly those with perennial allergic rhinitis, may experience sleep disorders and daytime fatigue. Often they attribute this to medication, but studies suggest congestion may be the culprit in these symptoms. In addition, a 2002 study indicated that patients with seasonal allergies experience hundreds of brief, subtle awakenings, called "microarousals," each night. In such cases, people are not aware that they wake up, but such events can cause fatigue the next day. A 2006 study of nearly 600 patients with allergic rhinitis found that sleep disorders and poor sleep quality were prevalent. Patients who had severe allergic rhinitis had worse sleep problems than those with mild allergic rhinitis.

Asthma and allergies often coexist, and the allergic response plays a strong role in childhood asthma. About 70 - 85% of children with asthma have allergies. Aggressive treatment of allergies in children with asthma can lower the risk for asthma attacks. Treating allergies in children may also help prevent the onset of asthma.

Any chronic rhinitis, whether allergic or nonallergic, can cause swelling in the turbinate, which may become persistent (turbinate hypertrophy). The turbinate is a tiny shelf-like bony structure that protrudes in the nasal passageways. It helps warm, humidify, and clean the air that passes over it. If turbinate hypertrophy develops, it causes persistent nasal congestion and, sometimes, pressure and headache in the middle of the face and forehead. This condition requires surgery.

Children with severe allergies may have a higher risk for behavioral problems than those without allergies. Some research suggests that allergic rhinitis is responsible for 2 million missed school days each year.
There have been reports that 30 - 45% of people with allergic rhinitis also suffer from ear infections (otitis media).
Chronic nasal obstruction from year-round allergies can affect a child's appearance. If a child can only breathe through the mouth, the continual force of air passing through the oral cavity can change facial development. Such changes may include an elongated face and an overbite from teeth coming in at an abnormal angle.
Chronic rhinitis can cause headaches and also affect a child's sleep, concentration, hearing, appetite, and growth.

Depression. Some evidence has linked depression with allergies. A 2002 study, for example, found that people with depression reported a higher rate of allergic disorders (71%) compared to nondepressed individuals (43%). During allergy season, patients with allergies were more likely to experience mood changes, including sadness, lethargy, and mental fatigue, than at other times. Some evidence suggests that specific immune factors in the allergic response can cause depressive symptoms. Other research indicates that both may have a common cause.

Parkinson’s Disease. A 2006 study suggested that allergic rhinitis may be associated with the later development of the neurological disorder Parkinson’s disease. The researchers think that the inflammatory response may be the link between the two conditions. However, there is not yet any evidence that treating allergic rhinitis can prevent Parkinson’s disease.

Chronic Fatigue Syndrome (CFS). Some, although not all, studies have reported that a majority of patients with CFS also have allergies to foods, pollen, metals (such as nickel or mercury), or other substances. One theory is that allergens, like viral infections, may trigger a harmful overreaction of the immune system that can cause fatigue, joint aches, and fever as well as hormone and brain chemical disturbances. (However, most people with allergies do not have CFS.)

Diagnosis

To determine the cause of allergic rhinitis, the doctor will ask a number of questions about:

Time of day and year of rhinitis episodes. Rhinitis that appears seasonally is typically due to pollens and outdoor allergens. If symptoms occur throughout the year, the doctor will suspect perennial allergic or non-allergic rhinitis.
Family history of allergies.
History of medical problems.
In women, if they are pregnant or taking drugs that contain estrogen (oral contraceptives, hormone replacement therapy).
Use of other medications including decongestants, which can cause a rebound effect.
Pets.
Any additional unusual symptoms. As examples, bloody nasal discharge and obstruction in only one nasal passage could suggest a tumor. Fatigue, sensitivity to cold, weight gain, and depression may be signs of hypothyroidism.

The doctor will examine the inside of the nose with an instrument called a speculum. This is a painless examination allowing the doctor to check for redness and other signs of inflammation. The doctor will also usually check the eyes, ears, and chest.

A skin test is a simple method for detecting common allergens. Patients are usually tested for a panel of common allergens. Skin tests are rarely needed to diagnose mild seasonal allergic rhinitis, since the cause is usually obvious. The skin test is not appropriate for children younger than age 3.

The procedure is as follows:

Patients should not take antihistamines for at least 12 - 72 hours before the test. Otherwise an allergic reaction may not show up.
Small amounts of suspected allergens are applied to the skin with a needle prick or scratch or are injected a few cells deep into the skin. The injection test may be more sensitive than the standard prick test.
If an allergy is present, a hive (a swollen reddened area) forms within about 20 minutes.

The test is not completely accurate. For instance, a 2001 study reported that testing detected allergies in less than half of children with rhinitis. Furthermore, about 15 - 20% of people may have a skin reaction without actually having an allergy.

Nasal Smear. The doctor may take a nasal smear. The nasal secretion is examined microscopically for factors that might indicate a cause, such as increased numbers of white blood cells, indicating infection, or high counts of eosinophils. High eosinophil counts indicate an allergic condition, but low counts do not rule out allergic rhinitis.

Tests for IgE. Blood tests for IgE immunoglobulin production may also be performed. One test is called the radioallergosorbent Test (RAST), used to detect increased levels of allergen-specific IgE in response to particular allergens. Blood tests for IgE may be less accurate than skin tests. They should be performed only on patients who cannot undergo skin testing or when skin test results are uncertain.

In people with chronic rhinitis, the doctor may also check for sinusitis. Imaging tests may be useful if other tests are ambiguous.

A test called transillumination, in which a doctor shines a bright light against the patient's cheek or forehead, is an inexpensive method for checking for abnormalities in the sinus cavities, although it is not highly accurate.
CT scans may be useful for some cases of sinusitis.

Click the icon to see an image of a CT scan.

In certain cases of chronic or unresponsive seasonal rhinitis, a doctor may use endoscopy to examine for any irregularities in the nose structure. Endoscopy uses a tube inserted through the nose that contains a miniature camera to view the passageways.

Treatment

If rhinitis is caused by non-allergic conditions, particularly if there are accompanying symptoms indicating a serious problem, the doctor should treat any underlying disorders. If rhinitis is caused by medications, such as decongestants, the patient may need to stop taking them or find alternatives.

Patients with chronic allergic rhinitis may require daily medications. Patients with severe seasonal allergies should start medications a few weeks before the pollen season and continue taking them until the season is over. Effective medications include:

Drugs that reduce the inflammatory response are important for preventing severe allergic rhinitis. Nasal corticosteroids (commonly called steroids) are now considered to be the most effective measure for preventing allergy attacks. Other anti-inflammatory drugs include leukotriene-antagonists and nasal cromolyn.
Antihistamine tablets relieve sneezing and itching and can prevent nasal congestion before an allergy attack. Many brands are available by prescription and over-the-counter.
Immunotherapy ("allergy shots") may be considered for patients with severe seasonal allergies that do not respond to treatment. It may also prevent asthma and the development of new allergies in children. Many experts now recommend immunotherapy for people with both asthma and allergies. Newer immunotherapeutic approaches using specially designed antibodies and vaccines are also showing promise.

All drug treatments have side effects, some very unpleasant and, in rare cases, serious. Patients may need to try different drugs until they find one that relieves symptoms without producing excessively distressing side effects.

Because seasonal allergies generally last only a few weeks, most doctors do not recommend the more potent prescription treatments for children. It is important for parents to determine if the child is actually under severe distress and that the parent is not simply responding to their own anxiety when they hear the child snorting or snoring. Prescription drugs are required only in severe cases. However, in children with both asthma and allergies, treatments for allergic rhinitis may also improve asthmatic symptoms.

Treating Mild Allergy Attacks. Mild allergy attacks usually require little more than reducing exposure to allergens and using a nasal wash. Dozens of treatments are available for allergic rhinitis. Many are available over-the-counter, but some require a prescription. They include the following:

Nasal washes
Decongestants that relieve nasal congestion and itchy eyes
Decongestant/antihistamine combinations

Due to side effects, decongestants should not be used in children ages 14 years or younger. Also, overuse of nasal decongestions can actually worsen sinus congestion.

Treating Severe Allergic Rhinitis. Patients with chronic allergic rhinitis, particularly if they also have asthma, may require daily medications. These drugs include:

Antihistamines. The newer non-sedating antihistamines -- such as cetirizine (Zyrtec), loratadine (Claritin), fexofenadine (Allegra), or desloratadine (Clarinex) -- cause less drowsiness than older antihistamines, such as Benadryl. Some of the newer drugs, such as Zyrtec and Clarinex, may also relieve nasal congestion.
Anti-inflammatory drugs. Nasal corticosteroids are now considered to be the most effective measure for preventing allergy attacks. They are recommended for patients with very severe allergies that do not respond to antihistamines.
Leukotriene-antagonists and nasal cromolyn may be beneficial in specific cases of allergies
Immunotherapy ("allergy shots") works well for many patients with severe allergies. It is also proving to reduce asthma symptoms and the use of asthma medications in patients with known allergies.

Itching and redness in the eyes sometimes respond to oral antihistamines. Eye drops, however, provide faster relief, and a combination of the two may be best. The following are eye drops for itchy eyes. Others are also available. Individual responses vary, and patients need to find which specific treatment works best for them.

Antihistamine eye drops: azelastine (Optivar), olopatadine (Patanol), ketotifen (Zaditor), levocabastine (Livostin) for relief of both nasal symptoms and itchy red eyes
Decongestant eye drops: phenylephrine (Allergan Relief), naphazoline (Naphcon, Opcon-A, VasoClear), tetrahydrozoline (Murine Plus, Visine)
Combination decongestant/antihistamine: Visine A.
Corticosteroids: loteprednol (Lotemax, Alrex), pemirolast (Alamast).

General Side Effects and Warning.

All eye drops can cause stinging, and some may result in headache and congestion.
No one should continue taking eye drops if they experience pain, changes in vision, worsened redness, or irritation, or if the condition lasts more than 3 days.
Do not touch the tip of the device to the eye or touch other surfaces with it. Replace the cap after using. Discard any solution that changes color or becomes cloudy.
People who have heart disease, high blood pressure, an enlarged prostate gland, or glaucoma should talk to their doctor before taking these types of eye drops.

Other Treatments

For mild allergic rhinitis, a nasal wash can be helpful for removing mucus from the nose. You can purchase a saline solution at a drug store or make one at home (one cup of warm water, half teaspoon salt, pinch of baking soda). Over-the-counter saline nasal sprays that contain benzalkonium chloride as a preservative may actually worsen symptoms and infection.

Simple method for administering a nasal wash:

Lean over the sink head down.
Pour some solution into the palm of the hand and inhale it through the nose, one nostril at a time.
Spit the remaining solution out.
Gently blow the nose.

The solution may also be inserted into the nose using a large rubber ear syringe, available at a pharmacy. In this case the process is:

Lean over the sink head down.
Insert only the tip of the syringe into one nostril.
Gently squeeze the bulb several times to wash the nasal passage.
Then press the bulb firmly enough so that the solution passes into the mouth.
Repeat the process in the other nostril.

Nearly half of asthma or allergy sufferers resort to alternative treatments. To date, however, little evidence supports treatments such as high-dose vitamins, homeopathic remedies, and most herbal remedies. Some relaxation methods, such as massage therapy, may be beneficial in reducing stress related to allergy symptoms. According to research presented at a 2004 allergy conference, acupuncture is now the most popular alternative treatment among allergy sufferers. The following are examples of recent areas of research:

Acupuncture may provide symptom relief for persistent allergic rhinitis in children, according to results published in a 2004 pediatrics journal. The study compared the effects of active versus sham acupuncture. Larger trials are needed to confirm these results.
Butterbur (also known as Petasites hybridus, butter dock, blatterdock, bog rhubarb, and exwort) is a plant found in Europe, North American, and parts of Asia. It is a traditional herbal remedy used for seasonal allergies and asthma. In a 2002 study, it was as effective and less sedating than a commonly prescribed antihistamine for treating seasonal allergies over a 2-week period.
Probiotics are beneficial bacteria that may help protect against allergies and asthma. Probiotics are available in active yogurt cultures and in supplements, which are being studied for protection.

Generally, manufacturers of herbal remedies and dietary supplements do not need FDA approval to sell their products. Just like a drug, herbs and supplements can affect the body's chemistry, and therefore have the potential to produce side effects that may be harmful. There have been a number of reported cases of serious and even lethal side effects from herbal products. Always check with your doctor before using any herbal remedies or dietary supplements.

The following are special concerns for people with allergic rhinitis:

Grapeseed extract is sometimes touted as a natural antihistamine. A 2002 study, however, reported no benefits from it.
A 2002 study found no benefits with homeopathy immunotherapy for asthmatic patients allergic to dust mites.
Some patients have reported worse symptoms after drinking herbal teas, which may contain leaves or pollens the patient is sensitive to. Herbal remedies themselves can trigger an allergic reaction. For example, echinacea is of special concern. This herbal remedy actually boosts the immune system. People with nasal congestion may mistakenly take it because it is often used to treat colds. In the case of allergies, however, echinacea may worsen symptoms or even trigger them in people who haven't experienced them. People with autoimmune diseases or who have plant allergies should particularly avoid it.
A Chinese herbal cold and allergy remedy sold as Aller Relief contains trace amounts of aristolochic acid, a chemical that is toxic to the kidneys and a carcinogen. Products containing aristolochic acid have been associated with several reports of kidney failure in Europe. Of specific concern are studies suggesting that up to 30% of herbal patent remedies imported from China have been laced with potent pharmaceuticals such as phenacetin and steroids. Asian herbal remedies may also contain toxic metals.
Aromatherapy is often used for relaxation. Some of the exotic plant extracts in these formulas have been associated with a wide range of skin allergies.

Decongestants

For mild allergic rhinitis, a nasal wash can be helpful for removing mucus from the nose. Decongestants may help dry nasal congestion. They work by shrinking vessels in the nose. By reducing blockage, they decrease the risk of developing sinusitis caused by viruses or bacteria. Many over-the-counter decongestants are available, either in tablet form or as nasal or inhaled decongestants that are applied directly into the airways as sprays, drops, or vapors.

Nasal-delivery decongestants are applied directly into the nasal passages with a spray, gel, drops, or vapors. Nasal decongestants come in long-acting or short-acting forms. The effects of short-acting decongestants last about 4 hours; long-acting decongestants last 6 - 12 hours. The active ingredients in nasal decongestants include oxymetazoline, xylometazoline, and phenylephrine. Nasal forms work faster than oral decongestants and may not cause as much drowsiness. However, they can cause dependency and rebound.

Dependency and Rebound. The major hazard with nasal-delivery decongestants, particularly long-acting forms, is a cycle of dependency and rebound effects. The 12-hour brands pose a particular risk for this effect.

With prolonged use (more than 3 - 5 days), nasal decongestants lose effectiveness and can cause swelling in the nasal passages.
The patient then increases the frequency of the dose. As the congestion worsens, the patient may respond with even more frequent doses.
This causes dependency and increased nasal congestion.

Tips for Use. The following precautions are important for people taking nasal decongestants:

When using a nasal spray, spray each nostril once. Wait a minute to allow absorption into the mucosal tissues, and then spray again.
Do not share droppers and inhalators with other people.
Discard sprayers, inhalators, or other decongestant delivery devices when the medication is no longer needed. Over time, these devices can become reservoirs for bacteria.
Discard the medicine if it becomes cloudy or unclear.

Oral decongestants also come in many brands, which have similar ingredients. The most common active ingredient is pseudoephedrine (Sudafed, Actifed, Drixoral), sometimes in combination with an antihistamine. [The alternative decongestant, phenylpropanolamine (PPA) was taken off the market.] A small 2006 study reported that over-the-counter pseudoephedrine works just as well as the prescription drug montelukast (Singulair) in controlling allergic rhinitis symptoms. Patients in the study received a once-daily morning dose (240 mg) of ephedrine. Researchers suggest that taking pseudoephedrine in the morning, as opposed to later in the day or before bedtime, can help patients avoid side effects such as insomnia and nervousness.

Decongestants have certain adverse effects, which are more apt to occur in oral than nasal decongestants. These side effects include:

Agitation and nervousness
Drowsiness (particularly with oral decongestants and in combination with alcohol)
Changes in heart rate and blood pressure
Avoid combinations of oral decongestants with alcohol or certain drugs, including monoamine oxidase inhibitors (MAOI) and sedatives.

Individuals at Risk for Complications from Decongestants. People who may be at higher risk for complications are those with certain medical conditions, including disorders that make blood vessels highly susceptible to contraction. Such conditions include:

Heart disease
High blood pressure
Thyroid disease
Diabetes
Prostate problems that cause urinary difficulties
Migraines
Raynaud's phenomenon
High sensitivity to cold
Emphysema or chronic bronchitis. (Individuals with these conditions should particularly avoid high-potency, short-acting nasal decongestant.)
Medications that increase serotonin levels, such as certain antidepressants, anti-migraine drugs, diet pills, St. John's wort, and methamphetamine. The combination of these medicines and decongestants can cause blood vessels in the brain to narrow suddenly, causing severe headaches and even stroke.

Anyone with these conditions should not use oral or nasal decongestants without a doctor's guidance. Other people who should not use decongestants without first consulting a doctor include:

Pregnant women
Children. The American College of Chest Physicians advises against the use of over-the-counter decongestants and other cold medications in children ages 14 years or younger. Children are at particular risk for side effects that depress the central nervous system. Such symptoms cause changes in blood pressure, drowsiness, deep sleep, and, rarely, coma. In 2007, the FDA began reviewing the safety and effectiveness of cough and cold remedies for children.

In 2000, the Food and Drug Administration (FDA) took action to ban oral decongestants containing phenylpropanolamine (PPA) from the U.S. market. This action was in response to reports of an increased risk of stroke in young women who took products containing this ingredient. All major brands that previously contained PPA have now substituted other active ingredients (usually pseudoephedrine) and are safe to use.

Anyone with old forms of decongestant should check the labels and discard them if they contain phenylpropanolamine.

Antihistamines

Histamine is one of the chemicals released when antibodies overreact to allergens. It is the cause of many symptoms of allergic rhinitis. Antihistamines can help relieve:

Itching, sneezing, and nasal discharge
Other allergy symptoms unrelated to rhinitis, including hives and some rashes
Nasal congestion, for some of the newer antihistamines, such as cetirizine (Zyrtec) and desloratadine (Clarinex)

If possible, patients should take antihistamines before an anticipated allergy attack.

Many antihistamines are available. They include short-acting and long-acting forms and are available as tablets, nasal-inhalers, eye drops, and syrups. Antihistamines are generally categorized as first- and second-generation. First-generation antihistamines may cause more side effects than newer second-generation ones.

There are some notes of caution when taking any antihistamine:

Antihistamines may thicken mucus secretions and can worsen bacterial rhinitis or sinusitis.
Antihistamines can lose their effectiveness over time, and a different one may need to be tried.

First-Generation Antihistamines Ingredients and Brand Names. The older, so-called first generation antihistamines include:

Diphenhydramine (Benadryl)
Carbinoxamine (Clistin)
Clemastine (Tavist)
Chlorpheniramine (Chlor-Trimeton). Some health professionals recommend this drug if antihistamines are required during pregnancy. It may be as effective as the second generation antihistamines and much less expensive.
Brompheniramine (Dimetane)
Promethazine (Phenergan). This antihistamine should never be used for children younger than age 2 because it may cause life-threatening breathing problems.

First-generation antihistamines contain compounds called anticholinergics, which tend to produce more side effects than second-generation antihistamines.

Side Effects

Drowsiness and impaired thinking
Dry mouth
Dizziness
Agitation
Insomnia or nightmares
Sore throat
Rapid heart beat and chest tightness (uncommon and should be reported)
Men with enlarged prostate glands may experience difficulty urinating

Drowsiness and First-Generation Antihistamines. Drowsiness is the most distressing side effect reported from first-generation antihistamines, and is potentially serious. It may pose a higher than average risk for work-related and automobile accidents than alcohol, narcotics, or prescription sedatives. However, some studies have not found any strong differences in sedation between the first- and second-generation antihistamines. Still, experts caution against the first-generation antihistamines for people most at risk from sedative effects, particularly elderly individuals. To reduce risks, take the antihistamine at home a few hours before bedtime, and do not combine it with alcohol or tranquilizers. Do not drive or operate heavy machinery.

The newer second-generation antihistamines do not contain anticholinergics, so they do not usually cause drowsiness to the extent that the first generation antihistamines do. They are sometimes referred to collectively as nonsedating antihistamines.

A major 2003 analysis reported that although Benadryl, the most common first-generation antihistamine, had a more negative effect on daily activities than the newer antihistamines, the differences were modest. Researchers in the study concluded that no clear distinction exists between the first- and second-generation antihistamines.

Brand Names. The second-generation drugs include:

Loratadine (Claritin). Claritin is available over-the-counter and is approved for children ages 2 and older. Desloratadine (Clarinex) is similar to Claritin but stronger and longer-lasting. It is available only by prescription.
Cetirizine (Zyrtec). Zyrtec is approved for both indoor and outdoor allergies. It is the only antihistamine to date approved for infants as young as 6 months. It is available over-the-counter.
Fexofenadine (Allegra) is also available over-the-counter.
Acrivastine (Semprex)
Ebastine, norastemizole, levocetirizine, and mizolastine are other second-generation antihistamines under investigation in the U.S. and Europe. Some may prove to be useful for specific populations.

For nonprescription antihistamines, some studies suggest that cetirizine (Zyrtec) is more effective than Allegra or Claritin in improving symptoms, including those in children. However, cetirizine can cause drowsiness when taken at high doses.

Zyrtec and Claritin are approved for children younger than 5 years, although most antihistamines appear to be safe in children. Zyrtec is the only antihistamine approved for both indoor and outdoor allergies and for infants as young as 6 months. Both are available in syrup form. Studies with Zyrtec have reported fewer symptoms in children allergic to dust mites, and one study reported that infants with allergies who were given Zyrtec were much less likely to develop asthma later on than untreated infants. Claritin, at this time, is generally the preferred drug for young people, however, because it has the least negative effect on concentration and learning. Women who are pregnant or nursing should avoid these medications unless recommended by a doctor.

Side Effects and Precautions

Common side effects include headache, dry mouth, and dry nose. (These are often only temporary and go away during treatment.)
Drowsiness occurs in about 10% of adults and between 2 - 4% of children.
Uncommon side effects include rapid heart beat and chest tightness. Tell your doctor if these effects occur.
Extended-release forms of Claritin and Zyrtec have other ingredients that can cause other symptoms, including nervousness, restlessness, and insomnia. Some patients taking Claritin-D 24 Hour Extended Release tablets have reported obstruction in the upper gastrointestinal tract, including difficulty swallowing.

Drug and Food Interactions. Two earlier second generation drugs, terfenadine (Seldane) and astemizole (Hismanal), in rare cases, caused dangerous heart rhythm abnormalities, particularly in high doses or in people who had liver disease. They also caused interactions with certain other medications and grapefruit juice. Both Seldane and Hismanal have been taken off the market. Allegra, Zyrtec, and Claritin do not appear to pose any of the dangers associated with Seldane.

Until more is known, however, anyone who takes a second-generation antihistamine should probably avoid or use with caution combinations with grapefruit juice or the drugs that caused problems with Seldane and Hismanal. Such medications include:

The antibiotics clarithromycin (Biaxin) and troleandomycin
Certain HIV protease inhibitors
Antidepressant serotonin-reuptake inhibitors (Prozac, Paxil, and Serzone)

Azelastine (Astelin) and levocabastine (Livostin) are available in nasal spray form. They can reduce nasal congestion as well as allergy symptoms. Both reduce symptoms, although azelastine may be more effective in some patients. Their disadvantages are a bitter taste, drowsiness, and expense. They are not as effective as steroid nasal sprays.

Many prescription and non-prescription products that combine antihistamines and decongestants are available. Combinations sold over-the-counter include Allerest, Sudafed Severe Cold Formula, Vicks DayQuil, Benadryl Allergy/Sinus, Contac Day/Night Allergy & Sinus. Prescription combinations include Claritin-D, Allegra D, and Zyrtec-D. Symptoms may improve within 60 minutes, with congestion clearing up first.

Corticosteroids

A number of drugs are available for reducing the inflammatory response in allergies. These drugs can help prevent an allergy attack from occurring.

Nasal-spray corticosteroids (commonly called steroids) are considered the most effective drugs for treating severe allergic rhinitis. Corticosteroids suppress important stress and other hormones in a region of the brain called the HPA axis. The suppression of these hormones blocks the inflammatory response that triggers an allergic attack. Steroids do not relieve symptoms immediately. It may take several hours before their effects are felt. Nasal spray steroids benefits include:

Reducing inflammation and mucus production
Improving night sleep and daytime alertness in patients with perennial allergic rhinitis
Treating polyps in the nasal passages

Comparison studies report that nasal steroid sprays work better than second generation antihistamines, such as loratadine (Claritin) and cetirizine (Zyrtec), and are possibly even more effective than allergy shots. They have no effect on itchy eyes, however.

Nasal-Spray Brands. Corticosteroids available in nasal spray form include:

Triamcinolone (Nasacort). Approved for children over age 6.
Mometasone furoate (Nasonex). Approved for use in patients age 3 and older.
Fluticasone (Flonase, Flounce, generic). Approved for children over age 4.
Beclomethasone (Beconase, Vancenase), flunisolide (Nasalide), and budesonide (Rhinocort). Approved for children over age 6.
Ciclesonide (Omnaris). Approved for patients age 12 and older.

Side Effects. Corticosteroids are powerful anti-inflammatory drugs. Although oral steroids can have many side effects, the nasal-spray form affects only local areas and has less risk for widespread side effects unless the drug is used excessively. Side effects of nasal steroids may include:

Dryness, burning, stinging in the nasal passage
Sneezing
Headaches and nosebleed (uncommon but should be reported to your doctor immediately)

Possible Long-Term Complications. All corticosteroids suppress stress hormones. This effect is known to produce some serious long-term complications in people who take oral steroids. Researchers have found far fewer concerns with nasal administration or inhaled forms, but there may be certain problems:

Effect on growth. The major concern for children is whether nasal steroids, like other forms of steroids, will adversely affect growth. Studies report either a temporary and slight (about half an inch) early effect on growth or no effect at all.
Effect on eyes. Glaucoma is a known side effect of oral steroids. Some ophthalmologists have observed higher pressure in the eye (a sign of glaucoma) in some patients taking nasal steroid sprays. (Studies have found no increased risk for cataracts in young people who have taken intranasal steroids). The eye pressure appears to return to normal after stopping the steroid, but periodic eye examinations are advised.
Use during pregnancy. Steroids appear to be safe during pregnancy, but pregnant women should talk to their doctor about other options before taking them.
Nasal passage injury. Steroid sprays may injure the nasal septum (the bony area that separates the nasal passage) if the spray is directed onto it. This complication is very rare.
Lower resistance to infection. People with any infectious disease or injury in the nose should not take these drugs until the disease or wound has been treated and cured.

Cromolyn serves as both an anti-inflammatory drug and a specific blocker for allergens. The standard cromolyn nasal spray (Nasalcrom) is not as effective as steroid nasal sprays but does work well for many people with mild allergies. It is one of the preferred first-line therapies for pregnant women with mild allergic rhinitis. It may take up to 3 weeks to experience full benefit.

Side Effects. Cromolyn has no major side effects, but minor ones include nasal congestion, coughing, sneezing, wheezing, nausea, nosebleeds, and dry throat. The spray can cause burning or irritation.

Leukotriene-antagonists are oral drugs that block leukotrienes, powerful immune system factors that are important in causing airway constriction and mucus production in allergy-related asthma. Leukotriene-antagonists include zafirlukast (Accolate), montelukast (Singulair), zileuton (Ziflo), and pranlukast (Ultair, Onon). These drugs are mainly used to treat asthma. Montelukast was approved in 2003 to treat seasonal allergies, and in 2005 to treat indoor allergies.

Immunotherapy

Immunotherapy (commonly referred to as "allergy shots") is a safe and effective treatment for patients with allergies. It is based on the premise that people who receive injections of a specific allergen will lose sensitivity to that allergen. The most common allergens for which shots are given are house dust, cat dander, grass pollen, and mold.

Immunotherapy benefits include:

Targeting the specific allergen.
Reducing sensitivity in airways in the lungs as well as in the upper airways.
Preventing the development of new allergies in children.
Reducing asthma symptoms and the use of asthma medications in patients with known allergies. Research suggests it may also help prevent the development of asthma in children with allergies.

Candidates for Immunotherapy. Immunotherapy may be given to anyone over age 7 whose allergies are severe and who do not respond to medication. Many experts agree that immunotherapy should be considered as soon as possible for children with asthma and allergies. Immunotherapy is safe for pregnant women who are already receiving it, although half-strength doses are generally recommended, and it should not be started during pregnancy.

Individuals at Risk for Complications. People who should probably avoid immunotherapy include those who have:

An extreme response to skin tests (this may predict an allergic reaction).
Wheezing.
Uncontrolled severe asthma or lung disease.
Patients taking certain medications (such as beta-blockers).
The health status of anyone should be determined before starting treatment.

The major downside to immunotherapy is that it requires a prolonged course of weekly injections. The process generally includes:

Injections of diluted extracts of the allergen are given on a regular schedule, usually twice a week to weekly at first, then in increasing doses until a maintenance dose has been reached. It usually takes several months and may take up to 3 years to reach a maintenance dose.
At that time, intervals between shots can be 2 - 4 weeks, and the treatment is continued for another 3 - 5 years.
Patients can experience some relief within 3 - 6 months. If there is no benefit within 12 - 18 months, discontinue the shots.

After stopping immunotherapy, about a third of allergy sufferers no longer have any symptoms, a third have improved symptoms, and a third relapse.

The use of an injection series is effective, but patients often fail to comply with the regimens. Some other schedules and delivery methods are being investigated that might make the program easier and less distressing.

Rush Immunotherapy. Investigators are studying "rush immunotherapy," in which patients achieve the full maintenance dose with several shots a day over a period of 3 - 5 days. Rush therapy uses modifications that reduce the risk of severe reactions to excessive doses. Studies suggest that it is effective and safe, with few side effects other than itching. Patients must be monitored closely during this period, however, for severe reactions.

Oral Forms. Trials are underway to test oral forms of immunotherapy as an alternative to allergy shots. These methods include using a pill taken by mouth or a sublingual (under-the-tongue) tablet. Although oral and sublingual immunotherapy is prescribed in many countries in Europe and South America, it is not approved in the United States and is not considered accepted therapy at this time.

Injections for ragweed and, sometimes, dust mites have higher risks for side effects than other allergy shots. If complications or allergic reactions develop, they usually occur within 20 minutes, although some can develop up to 2 hours after the shot is given.

Side effects of immunotherapy include:

General itching, swelling, red eyes, hives, soreness at the injection site.
Less common side effects are low blood pressure, asthma worsening, or difficulty breathing. This is due to an extreme hypersensitivity response called anaphylaxis. It can also occur if excessive doses are given.
In rare cases, particularly because of excessive doses or if a patient has a serious lung problem, severe reactions can occur, which can be life threatening.
Premedicating patients with antihistamines and corticosteroids may help reduce the risk of reactions to immunotherapy, although this could mask early warning signs.

In a 10-year study, the incidence of any adverse effect was less than two-tenths of 1%, and the great majority of events were mild. The risk for a fatal response is estimated to be 1 in 63 million injections. (As a comparison, the risk for a fatal reaction to penicillin is much higher, 1 in 7.5 million injections.)

Vaccines. Of particular interest is the development of immunotherapeutic vaccines that use more specific targets to produce an insensitivity to allergens. One such vaccine uses a small protein from the allergen, which is injected into the patient. Other vaccines under investigation are those that use the allergen's genetic material (its DNA) to promote tolerance to the allergen. In a promising 2006 pilot study, patients who received 6 weekly injections of a DNA-based experimental ragweed vaccine had symptom reductions that lasted a year later into a second ragweed season. Researchers will be testing this vaccine in further clinical trials.

Monoclonal Antibodies. Monoclonal antibodies (MAb) are genetically-developed antibodies that are designed to target and attack very specific factors. A MAb known as omalizumab (Xolair) prevents the antibody immunoglobulin E (IgE) from triggering the inflammatory events that lead to allergies. Studies in recent years have suggested that omalizumab may help reduce symptoms and improve quality of life for patients with non-seasonal allergic rhinitis. A 2006 study suggested that treatment with omalizumab before and during ragweed allergy shots may help reduce immunotherapy side effects. The drug is currently approved for asthma. In 2007, the FDA warned that omalizumab may cause a life-threatening allergic reaction (anaphylaxis) in some patients.

Prevention

People with existing allergies should avoid irritants or allergens. These triggers include:

Pollen. This is the primary cause of allergic rhinitis.
Dust mites, specifically mite feces, which are coated with enzymes that contain a powerful allergen. These are the primary allergens inside the home.
Animal dander (flakes of skin) and hair from cats, house mice, and dogs. House mice are proving to be significant sources of allergens, particularly in urban children.
Molds.
Fungi.
Cockroaches are major asthma triggers and may reduce lung function even in people without a history of asthma.
Some research suggests that alcohol intake may influence allergy severity. One study found that as little as one drink a day is enough to worsen dust mite allergies.
Some studies suggest that early exposure to some of these allergens, including dust mites and pets, may actually prevent allergies from developing in children.

Controlling Pets. People who already have pets and are not allergic to them are probably at low risk for developing such allergies later on. When children are exposed to more than one dog or cat during their first year, they have a much lower risk for not only pet allergies but also seasonal allergies and asthma. (Pet exposure does not protect them from other allergens, notably dust mites and cockroaches).

In children who have an existing allergy to pets, however, the pets should be given away or kept outside. If this isn't possible, they should at least be confined to carpet-free areas outside the bedroom. Cats harbor significant allergens, which can even be carried on clothing. Dogs usually present fewer problems. Washing animals once a week can reduce allergens. Dry shampoos, such as Allerpet, that remove allergens from skin and fur and are now available for both cats and dogs and are easier to use than wet shampoos.

For small children, stuffed animals might serve as a comforting replacement, although they might harbor dust mites. Putting stuffed animals in the freezer for 24 hours before washing them kills the dust mites. For best effect, this process should be done weekly.

Preventing Exposure to Cigarette and Cooking Smoke. Parents who smoke should quit. Studies show that exposure to second-hand smoke in the home increases the risk for asthma and asthma-related emergency room visits in children. [For help in quitting, see In-Depth Report # 41: Smoking.]

Controlling Dust. Spray furniture polish is very effective for reducing both dust and allergens. Air cleaners, filters for air conditioners, and vacuum cleaners with High Efficiency Particulate Air (HEPA) filters can help remove particles and small allergens found indoors. Neither vacuuming nor the use of anti-mite carpet shampoo, however, is effective in removing mites in house dust. Vacuuming actually stirs up both mites and cat allergens. People with these types of allergies should avoid having carpets or rugs in their homes.

Bedding and Curtains. Many experts recommend reducing exposure to dust mites by enclosing mattresses and pillows in semipermeable coverings. (Vinyl mattress covers limit airflow and may worsen, or even cause, asthma in children.) However, several 2005 studies suggested that such covers do not prevent allergies or asthma. Curtains should be replaced with shades or blinds and bedding washed using the highest water temperature setting.

Reducing Humidity in the House. Dust mites thrive in humidity, and damp houses increase the risk for mold. On-going humidifiers can worsen the problem. If they are used, humidity levels should not exceed 40%, and humidifiers should be cleaned daily with a vinegar solution.

Exterminating Pests (Cockroaches and Mice). Use professional exterminators to eliminate cockroaches. (One study reported that ridding a home of cockroaches and cleaning the house using standard housecleaning techniques failed to eliminate the cockroach allergens themselves.) Exterminate mice and attempt to remove all dust, which might contain mouse urine and dander.

Avoiding Outdoor Allergens. The following are some recommendations for avoiding allergens outside:

Start taking allergy medications 1 - 2 weeks before ragweed season begins. Be sure to take allergy medications before going outside. If regular medications do not work, ask your doctor about allergy shots.
Camping and hiking trips should not be scheduled during times of high pollen count (May and June for grass pollen and September to October for ragweed).
Patients who are allergic should avoid barns, hay, raking leaves, and mowing grass. (A mask can be worn during outdoor chores to help reduce pollen exposure.)
Sunglasses can help prevent pollen from getting into eyes.
After being outdoors, clean off pollen residue by bathing, washing hair and clothes, and using a nasal salt water rinse.

Some evidence suggests that people with allergic rhinitis and asthma may benefit from a diet rich in omega-3 fatty acids (found in fish, almonds, walnuts, pumpkin, and flax seeds) and fruits and vegetables (at least five servings a day). Some studies also suggest reducing sodium, trans fatty acids (hydrogenated fats found in commercial products and baked goods), and omega-6 fatty acids (found in most vegetable oils). Investigators are also studying probiotics -- so-called good bacteria, such as lactobacillus and bifidobacterium, which can be obtained in supplements.

Resources

www.aaaai.org -- American Academy of Allergy, Asthma & Immunology
www.acaai.org -- American College of Allergy, Asthma & Immunology
www.niaid.nih.gov -- National Institute of Allergy and Infectious Diseases
www.njc.org -- National Jewish Medical and Research Center
www.lungusa.org -- The American Lung Association

References

Bower JH, Maraganore DM, Peterson BJ, Ahlskog JE, Rocca WA. Immunologic diseases, anti-inflammatory drugs, and Parkinson disease: a case-control study. Neurology. 2006 Aug 8;67(3):494-6.

Calderon M, Alves B, Jacobson M, Hurwitz B, Sheikh A, Durham S. Allergen injection immunotherapy for seasonal allergic rhinitis. Cochrane Database Syst Rev. 2007 Jan 24;(1):CD001936.

Creticos PS, Schroeder JT, Hamilton RG, Balcer-Whaley SL, Khattignavong AP, Lindblad R, et al. Immunotherapy with a ragweed-toll-like receptor 9 agonist vaccine for allergic rhinitis. N Engl J Med. 2006 Oct 5;355(14):1445-55.

Leger D, Annesi-Maesano I, Carat F, Rugina M, Chanal I, Pribil C, et al. Allergic rhinitis and its consequences on quality of sleep: An unexplored area. Arch Intern Med. 2006 Sep 18;166(16):1744-8.

Review Date:
3/22/2007
Reviewed By:
Harvey Simon, MD, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is an independent audit to verify that A.D.A.M. follows rigorous standards of quality and accountability. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial policy, editorial process and privacy policy. A.D.A.M. is also a founding member of Hi-Ethics and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

A.D.A.M. Copyright

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997-2009 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

adam.com

Asthma in children and adolescents

FitSugar — Wed, 08 Oct 2008 17:35:28 -0700

HEALTH GUIDE REFERENCE FROM A.D.A.M

Highlights

Drug Warning

In 2007, the FDA requested the manufacturers of omalizumab (Xolair) to include a “boxed warning” emphasizing that this drug may cause a severe and life-threatening allergic reaction (anaphylaxis). Health care providers need to carefully observe patients for 2 hours after they receive an omalizumab injection. However, because an allergic reaction can occur up to 24 hours after the injection, patients need to know the signs and symptoms of anaphylaxis and how to self-administer emergency treatment. Omalizumab is approved for patients ages 12 and older who have moderate-to-severe asthma related to allergies.

Drug Approval

In 2006, budesonide/formoterol (Symbicort) was approved for patients age 12 years and older. Symbicort combines a corticosteroid and a long-acting beta2-agonist into a single inhaler.

Inhaled Corticosteroids

Inhaled corticosteroids may help reduce wheezing in young children with breathing problems, but they do not help prevent the development of asthma, according to several 2006 studies in the New England Journal of Medicine.
Inhaled corticosteroids work better than a corticosteroid/long-acting beta2-agonist combination or a leukotrine receptor antagonist drug in treating children with mild-to-moderate asthma, suggests a 2007 study in the Journal of Allergy and Clinical Immunology.

Long-Acting Beta2-Agonists

Long-acting beta2-agonist drugs such as salmeterol (Serevent Diskus) and formoterol (Foradil Aerolizer) may worsen asthma symptom severity and increase the risk for asthma-related death, indicates a 2006 review in the Annals of Internal Medicine.
Products that contain salmeterol and formoterol now have strengthened warning labels detailing these risks.

Childhood Asthma Statistics

Asthma death rates among children have largely declined since 1999 while doctors’ office visits for asthma treatment have more than doubled, indicates a recent report from the U.S. Centers for Disease Control and Prevention.

Introduction

The word asthma originates from an ancient Greek word meaning panting. Essentially, asthma is an inability to breathe properly. When any person inhales, the air travels through the following structures:

Air passes into the lungs and flows through progressively smaller airways called bronchioles. The lungs contain millions of these airways.
All bronchioles lead to alveoli, which are microscopic sacs where oxygen and carbon dioxide are exchanged.

The major features of the lungs include the bronchi, the bronchioles, and the alveoli. The alveoli are the microscopic blood vessel-lined sacks in which oxygen and carbon dioxide gas are exchanged.

Asthma is a chronic condition in which these airways undergo changes when stimulated by allergens or other environmental triggers. Such changes appear to be two specific responses:

The hyperreactive response (also called hyperresponsiveness)
The inflammatory response

These actions in the airway cause patients to cough, wheeze, and experience shortness of breath (dyspnea), the classic symptoms of asthma.

In the hyperreactive response, smooth muscles in the airways constrict and narrow excessively in response to inhaled allergens or other irritants. Airways in everyone's lungs respond by constricting when exposed to allergens or irritants but there are major differences in the hyperreactive response that occurs in people with asthma:

When people without asthma breathe in and out deeply, the airways relax and open in order to rid the lungs of the irritant.
When people with asthma try to take those same deep breaths, their airways do not relax but instead narrow, causing the patients to pant for breath. Smooth muscles in the airways of people with asthma may have a defect, perhaps a deficiency in a critical chemical that prevents the muscles from relaxing.

The hyperreactive stage is followed by the inflammatory response, which generally contributes to asthma in the following way:

The immune system responds to allergens or other environmental triggers by delivering white blood cells and other immune factors to the airways.
These so-called inflammatory factors cause the airways to swell, fill with fluid, and produce a thick sticky mucus.

Click the icon to see an image of a normal versus asthmatic bronchiole.

This combination of events results in wheezing, breathlessness, inability to exhale properly, and a phlegm-producing cough.

Inflammation appears to be present in the lungs of all patients with asthma, even those with mild cases, and plays a key role in all forms of the disease.

Causes

Asthma occurs in about 5 million American children. Each year about 200,000 of them are hospitalized. It is the most common chronic childhood illness. About half of all cases of asthma develop before the age of 10, and about 80% of patients develop symptoms before they are 5 years old.

The mechanisms that cause asthma are complex and vary among population groups and even individuals. For example, asthma in children is highly associated with allergies. However, only a minority of children with allergies have asthma, and allergic response cannot explain all cases of asthma. Other factors, such as genetics or environmental conditions are probably involved in the development of asthma. Most likely, several genes combine to make a child susceptible to environmental triggers, not only allergens but also possibly infections, dietary patterns, or air pollution. Physical factors, particularly having smaller lungs, affect the chances for later asthma.

Asthma and allergies often coexist, and the allergic response plays a strong role in childhood asthma. About 70 - 85% of children with asthma also have allergies. Some studies suggest that children who have allergies are also at greater risk for developing asthma as adults. A 2006 study found that children who are allergic to dust mites are three times more likely to later develop asthma than children who were not allergic.

However, the evidence is clearly mixed. Several other 2006 studies suggested that avoiding dust mites does not help prevent asthma and, in fact, early exposure to dust mites may even protect children from developing asthma and allergic responses. Some experts think that giving immunotherapy (“allergy shots”) to children with allergies may help prevent asthma development.

An asthma attack can be induced or aggravated by direct irritants to the lungs. Studies indicate that the more indoor allergens a child is allergic to, the higher the risk for severe asthma. Important irritants or allergens include the following:

Dust mites, specifically mite feces, which are coated with enzymes that contain a powerful allergen. These are the primary allergens in the home.
Animal dander. Cats harbor significant allergens, which can even be carried on clothing; dogs usually present fewer problems.
Molds.
Cockroaches. Cockroaches are major asthma triggers and may reduce lung function even in people without a history of asthma.
Pollen. An asthma attack from an allergic response to pollen is more likely to occur during extreme air changes, such as thunderstorms. Major weather changes, such as El Nino, can affect the timing of allergy seasons because they cause seasonal changes (and pollen) to start earlier.
Food allergies. About 8 - 10% of children with asthma also have food allergies. These children also appear to have a high risk for very serious reactions to such foods. In infants and toddlers, allergy to eggs appears to be a predictor of asthma.
Fossil Fuels. Certain chemicals may trigger allergic rhinitis. Some experts believe that refined fossil fuels, such as diesel fuel and particularly kerosene, may be important triggers for allergic rhinitis. In people who already have allergies or asthma, exposure to such fossil fuels may worsen symptoms.

The Allergic Response. The allergic process, called atopy, and its connection to asthma are not completely understood. It involves various airborne allergens or other triggers that set off a cascade of events in the immune system leading to inflammation and hyperreactivity in the airways. One description is as follows:

The conductor in an orchestra of immune factors that contribute to allergies and asthma appears to be a category of white blood cells known as helper T cells, in particular a subgroup called Th2 cells.
Th2 cells overproduce interleukins (ILs), immune factors that are molecular members of a family called cytokines, which are involved in the inflammatory process.
Interleukins 4, 9, and 13, for example, may be responsible for a first-phase asthma attack. These interleukins stimulate the production and release of antibody groups known as immunoglobulin E (IgE). (People with both asthma and allergies appear to have a genetic predisposition for overproducing IgE.)
During an allergic attack, these IgE antibodies can bind to special cells in the immune system called mast cells, which are generally concentrated in the lungs, skin, and mucous membranes. This bond triggers the release of a number of active chemicals, importantly potent molecules known as leukotrienes. These chemicals cause airway spasms, overproduce mucus, and activate nerve endings in the airway lining.
Another cytokine, interleukin 5, appears to contribute to a late-phase inflammatory response. This interleukin attracts white blood cells known as eosinophils. These cells accumulate and remain in the airways after the first attack. They persist for weeks and mediate the release of other damaging particles that remain in the airways.

Researchers are investigating the role that T cells play in asthma. T cells are white blood cells that are involved in the immune response. Researchers had focused on the T cell called type 2 helper (ThH2) cells. However, a 2006 breakthrough study in the New England Journal of Medicine suggested that a different type of T cell may play a stronger role in asthma than previously thought.

Researchers discovered that these cells, called natural killer T cells, are far more common in the lungs of people with asthma than in the lungs of healthy people. Natural killer T cells are very rare, but researchers found them in 60% of people with moderate-to-severe persistent asthma. While this research is preliminary, it may explain why corticosteroid drugs do not work well for some patients with asthma: Steroid drugs target Th2 and other inflammatory cells, not natural killer T cells. Researchers think that further investigation of natural killer T cells may lead the way to new types of asthma drugs. If these cells prove to be involved in asthma, then drugs that eliminate them might become an important new treatment.

Over the course of years the repetition of the inflammatory events involved in asthma can cause irreversible structural and functional changes in the airways, a process called remodeling. The remodeled airways are persistently narrow and can cause chronic asthma. Researchers are trying to determine how this process occurs:

Interleukins. Some researchers are looking at potent immune factors, including interleukins 11 and 13. They have been linked to a number of processes possibly involved in remodeling, including scarring in the airways and overgrowth of cells in the smooth muscles that line the airways.

Growth Factors. Compounds known as vascular endothelial growth factor (VEGF) have been observed in the airways of patients with asthma. VEGF is a powerful promoter of cell growth in blood vessel linings and some researchers believe it may be major factor in remodeling.

About one-third of all persons with asthma share this condition with another member of their immediate family. Asthma may be more likely to be passed to children from the mother than from the father. Both allergies and asthma are strongly associated with hereditary factors, sharing certain genetic markers, but they are not always inherited together.

Research on the genetics of these conditions is confusing. Of some significant promise, researchers have identified a gene (ADAM33), which has been linked to asthma. The gene regulates one of the enzymes called metalloproteases, which are involved with the smooth muscle in the airway. A mutation of this gene could play a role in airway changes that occur after inflammation.

The role of early childhood respiratory and intestinal infections is very complex. Viral respiratory infections certainly worsen existing asthma, but the most common ones are unlikely to be causes of childhood asthma. In fact, early respiratory and intestinal infections may offer some protection against asthma.

Early Respiratory Infections as Causes of Asthma. Studies suggest that most respiratory infections are not important causes of asthma in children, except in certain cases. An important exception is the respiratory syncytial virus (RSV), which has been implicated in the development of asthma. RSV is the major viral cause of infant pneumonia. Studies also indicate that infants who have reduced lung function within a few days after birth are at increased risk of developing asthma by the time they are 10 years old.

Common Respiratory Infections Worsen Asthma. Common respiratory infections viruses that cause colds (such as the rhinovirus) may in some cases be associated with the development of asthma. A 2007 study suggested that children who have a wheezing rhinovirus during infancy are at increased risk for developing asthma by age 6. Even if these viruses do not directly cause asthma, they can worsen asthma in children who already have it. Rhinovirus has been reported to be the most common infection associated with asthma attacks. In one study, it was associated with 61% of asthma worsening in children. Some research suggests that colds promote inflammation in patients with existing asthma and increase the intensity of airway responsiveness for weeks.

The Hygiene Theory: Early Infections as Protection Against Asthma. Another blames the dramatic increase in asthma on the reductions in childhood infections that have occurred with modern hygiene and antibiotic use. The basic theory rests on the idea that infections stimulate production of specific immune factors called Th1 cells. As these cells build up, they replace other immune factors called Th2 cells, which react to allergens -- a less serious threat to the body. Without infections to stimulate the production of the Th1 infection fighters, the Th2 allergen fighters are not replaced, and they persist at high levels, making the growing child more susceptible to allergies and asthma.

A number of different studies support this theory:

Some studies suggest that being part of a large family or attending day care increases the risk for early respiratory infections but reduces the risk of childhood asthma. The occasional cold, then, may be protective.
In one study, researchers measured levels of bacterial byproducts called endotoxins in the mattress dust of 812 children. Those with the highest levels had 80% lower rates in allergies and asthma.
Another study further found a strong association between allergy development and the absence of certain beneficial bacteria (called probiotics) carried in the infant's intestines. Infants who were born in more hygienic environments tended to lack these bacteria. Antibiotic overuse and modern hygiene may be reducing these helpful organisms. (Probiotics can be obtained in active yogurt cultures and in supplements, which are being studied for protection.)

The standard vaccinations against serious childhood infections, according to several important studies, pose no risk for asthma. One of the studies even reported some lower risk for asthma and allergies in the second and third years after vaccinations. Infections killed thousands of children every year before immunization became widespread. Asthma, although serious, is rarely fatal in children. No one should stop giving their children vaccinations against childhood killers.

GERD. At least half of patients with asthma also have gastroesophageal reflux disease (GERD), the cause of heartburn. It is not entirely clear which condition causes the other or whether they are both due to common factors.

Heartburn is a condition where the acidic stomach contents back up into the esophagus causing pain in the chest area. This reflux usually occurs because the sphincter muscle between the esophagus and stomach is weakened. Standing or sitting after a meal can help reduce the reflux which causes heartburn. Continuous irritation of the esophagus lining as in gastroesophageal reflux disease is a risk factor for the development of adenocarcinoma.

Some theories for the causal connection between GERD and asthma are:

Acid leaking from the lower esophagus in GERD stimulates the vagus nerve, which runs through the gastrointestinal tract. This stimulated nerve, in turn, triggers the nearby airways in the lung to constrict, causing asthma symptoms.
Acid back-up that reaches the mouth may be inhaled into the airways (aspirated). Here, the acid triggers a reaction in the airways that cause asthma symptoms.

GERD is sometimes hard to detect and might be suspected as a contributor in the following patients:

Those who do not respond to asthma treatments.
Those whose asthma attacks follow episodes of heartburn.
Those whose attacks are worse after eating or exercise.
Those whose coughs follow episodes of acid reflux. (One study found that GERD was associated with about half of the episodes of coughs and wheezes in patients with asthma.)

Treating GERD symptoms with anti-acid drugs may resolve asthma in some (but not all) patients who share both conditions. A small 2005 observational study found that while GERD was common in patients with asthma, treatment of GERD had no effect on asthma symptoms. [See In-Depth Report #85: Heartburn and gastroesophageal reflux disease.]

Sinusitis. Almost half of children and adults with allergic asthma have sinus abnormalities, and in various studies, between 17 - 30% of patients with asthma develop true sinusitis. The presence of sinusitis, however, does not appear to increase the severity of asthma.

Click the icon to see an image of sinusitis.

Parental Migraines and Childhood Asthma. Some studies have reported a link between childhood asthma and parental migraines, with one small study suggesting that children are about five times more likely to develop asthma if their parents have a history of migraines.

Exercise-induced asthma (EIA) is a limited form of asthma in which exercise triggers coughing, wheezing, or shortness of breath.

About 10% of adults and some fewer children have aspirin-induced asthma (AIA). With this condition, asthma gets worse when patients take aspirin. Aspirin is one of the drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). Although aspirin is used to reduce inflammation in other disorders, it appears to have the opposite effect in many asthma cases. It is not wholly known why this occurs. AIA often develops after a viral infection. It is a particularly severe asthmatic condition and is associated with up to 25% of asthma-related hospitalizations. In about 5% of cases, aspirin is responsible for a syndrome that involves multiple attacks of asthma, sinusitis, and nasal congestion. Such patients also often have polyps (small benign growths) in the nasal passages.

Patients with aspirin-induced asthma (AIA) should avoid aspirin and most likely NSAIDs, including ibuprofen (Advil) and naproxen (Aleve).

Acetaminophen (Tylenol) has been the traditional alternative for relief of minor pain for patients who are aspirin-sensitive. Unfortunately, recent evidence has muddied these recommendations. Moreover, some asthmatic episodes have been linked to high consumption of acetaminophen among adults. And a study of children with asthma reported that those who took ibuprofen were less likely to be hospitalized for asthma than those taking acetaminophen. This is of particular concern, since acetaminophen is the pain reliever of choice in small children.

Asthma occurs primarily at night (nocturnal asthma) in as many as 75% of patients with the condition. Attacks often occur between 2 - 4 a.m. Factors that might play role in nocturnal asthma may include one or more of the following:

Chemical and temperature changes in the body during the night that increase inflammation and narrowing of the airways
Delayed allergic responses from exposure to allergens during the day
The wearing off of inhaled medications toward the early morning
An increase in acid reflux (back up of stomach acid) that causes airways to narrow
Postnasal drip that occurs during sleep
Conditions relating to sleep, such as sleep apnea or sleeping on one's back, which may worsen any asthma attack that occurs at night

Some experts believe that nocturnal asthma may actually be a unique form of asthma with its own specific biologic mechanisms that occur only at night and which reduce natural steroid hormones (which block inflammation).

Exercise-induced asthma (EIA) is a limited form of asthma in which exercise triggers coughing, wheezing, or shortness of breath. This condition generally occurs in children and young adults, most often during intense exercise in cold dry air. Symptoms are generally most intense about 10 minutes after exercising and then gradually resolve.

EIA is triggered only by exercise and is distinct from ordinary allergic asthma in that it does not produce a long duration of airway activity, as allergic asthma does. (However, some people have both forms of asthma.) People who have only EIA do not appear to require long-term maintenance therapy. A study of military recruits with EIA also reported that the condition does not hinder a person's overall physical performance.

Medications. Cromolyn, a mild anti-inflammatory drug, or short-acting beta2-agonists have been the treatments of choice for preventing EIA. Newer approaches for people who work out regularly include pretreatment with long-acting beta2-agonists, such as salmeterol (Serevent) or the regular use of inhaled corticosteroids.

Hints for Reducing EIA. EIA occurs only after exercise and is more likely to occur with regular paced activities in cold, dry air. The following are some suggestions for reducing its impact:

Warm-up and cool-down periods are important.
Patients with EIA might do better with activities that involve short bursts of exercise (tennis, football) than with exercises involving long-duration regular pacing (cycling, soccer, and distance running).
Breathing through a scarf or through the nose helps warm up the airways.
Restricting dietary salt might help reduce EIA.

Click the icon to see an image of exercise-induced asthma.

Prognosis

Asthma is the third major cause of hospitalization in children under age 15. The condition can be very serious in children, particularly those younger than age 5, because their airways are very narrow.

The severity of asthma is graded as mild intermittent and mild, moderate, and severe persistent. A patient in any of these categories, even mild intermittent, can still experience a severe and even life-threatening attack. According to one report, 30% of asthma deaths occur in patients with mild asthma.

Asthma is rarely fatal in children, with only 187 asthma deaths reported in 2002 in children under age 18. In fact, a 2006 study from the U.S. Centers for Disease Control and Prevention reported that asthma death rates for children have steadily declined since 1999. (During the same time, the number of doctor visits for asthma treatment more than doubled.) Even low mortality numbers are unacceptable, however, since asthma deaths are largely preventable.

Factors associated with an increased risk of death from asthma in children include:

Previous life-threatening episodes of asthma
Lack of adequate and ongoing health care. (Most likely the reason for the higher fatalities rates in minority children.)
Significant behavioral problems
Underestimating the severity of an acute attack poses the greatest threat. Unfortunately, one study of children found that nearly 40% of them were unaware of asthmatic symptoms when they occurred.

African American children have more than six times the death rate of Caucasians in the age groups of 4 years and younger and 15 - 24 years. Hispanic children also have a higher risk.

The following signs and symptoms may indicate a life-threatening situation:

As the chest labors to bring enough air into the lungs, breathing often becomes shallow.
Lacking sufficient oxygen, the skin becomes bluish.
The flesh around the ribs of the chest appears to be sucked in.
The patient may begin to lose consciousness.

Asthma often progresses very slowly to a serious condition or may develop to a fatal or near-fatal attack within a few minutes. It is very difficult to predict when an attack will become very serious. Early symptoms or lack thereof do not always reflect the ultimate severity of an attack. Some studies even suggest that people at high risk for fatal or near-fatal asthma attacks are those with poor awareness of their own reduced ability to breathe and who are slow in seeking help. Monitoring peak flow rates is, therefore, an important management component, since it provides a more accurate assessment of lung function than symptoms alone.

In a 2003 study, researchers followed people with asthma for longer than 30 years. About a third of children had outgrown their asthma in adulthood. In general, the more severe the childhood asthma, the greater the likelihood that it will persist. For example, only 23% of children who experienced wheezy bronchitis (wheezing during respiratory infections) suffered from frequent or persistent asthma in adulthood.

There is evidence that severe asthma can cause long-lasting damage and possibly permanent scarring in some patients. The risk for such injury is highest, however, when asthma strikes children in the first 3 - 5 years. There does not appear to be any significant risk for long-term lung damage for children who develop mild-to-moderate persistent asthma between ages 5 - 12. Children adapt well to living with asthma, and even with severe asthma they can function as well as healthy children in virtually all areas of life.

Studies are mixed over the effects of emotional disorders on the severity of asthma. One study indicated that parents of children with asthma may suffer greater psychological stress than their children. A 2000 study reported that mild-to-moderate asthma does not significantly affect the psychological well-being of most children ages 5 - 12. Teenagers and preteens may have particular difficulty coping with what they perceive as the social stigma of asthma. Parents and older children should not hesitate to seek help from support groups, doctors, friends, or family members. Support programs may help children to better manage their asthma and even reduce hospitalization.

Although there have been few studies on the effects of asthma on schooling, a 2000 study reported that nocturnal (nighttime) asthma affected school attendance and performance in children and work attendance in their parents.

Risk Factors

Asthma affects about 5 million American children between the ages of 5 - 14. Asthma has dramatically increased worldwide over the last few decades, in both developed and developing countries. From 1980 - 1994, asthma increased 160% in American children younger than 4 years and has also dramatically risen worldwide. Experts are puzzling over the cause of this phenomenon. Possible causes and risk factors that are suspects in the dramatic rise in asthma in children include:

Survival rates are now higher in low-birth-weight babies, who may be more susceptible to asthma.
Declining rates in nursing may be a contributor. Breast milk contains important anti-inflammatory substances, such as omega-3 fatty acids, which might protect against asthma.
Western dietary habits (which commonly include more fast foods and less fruits, vegetables, fiber, minerals, and other nutrients) may contribute to the development of childhood asthma.
Children are spending more time indoors watching television, playing video games, or using the computer and are, therefore, overexposed to indoor allergens.
The trend of making homes more energy-efficient may result in dust mites being trapped inside them.

Among younger children, asthma develops twice as frequently in boys as in girls, but after puberty it may be more common in girls.

Urban Life. Urban life is strongly associated with a higher risk. Although poverty plays a significant role, urban life has been associated with a higher risk for asthma in any income group and among both children and adults. In some urban areas, as many as 25% of children have asthma or show signs of wheezing. In fact, it may be greatly underdiagnosed in city children. A 1999 study reported that almost a third of children in inner-city kindergartens had asthma symptoms without a diagnosis of the disorder; 10% had actually been diagnosed with asthma, mainly because their symptoms were severe.

Ethnicity. Since 1980, asthma rates have risen the most dramatically among African American children, and they have significantly higher rates of asthma than Caucasian children. Hispanic children are also at higher risk. Both groups of minority children are more likely to have fatal asthma than Caucasian children.

Some studies indicate that the difference in risk exists simply because African Americans and other minority groups are more likely to live in urban areas. Poverty and lack of access to health care also play a role. However, Caucasian children who live in cities also face a high risk for asthma, and rural African American children do not.

Urban life and socioeconomic factors, however, may not fully explain the ethnic disparity.

Low Birth Weight. Infants of low birth weight are at higher risk for lung problems and asthma.

Winter Birth. Children born in the winter may have a greater risk for asthmatic allergies to cockroaches than children born at other times of the year.

Vitamin D. A 2006 study suggested a link between vitamin D intake during pregnancy and development of early childhood asthma. Pregnant women who had a higher intake of vitamin D were less likely to give birth to children who developed asthma.

Breast Feeding. Most studies on breastfeeding report some protection against wheezing and asthma in the first year of life. Breastfeeding has many other benefits for the child as well. The American Academy of Pediatrics recommends exclusively breastfeeding for the child's first 6 months of life.

Complications of Pregnancy. According to a 2000 study, complications of pregnancy, specifically those involving the mother's uterus (such as post-birth hemorrhage, pre-term contractions, insufficient placenta, and restricted growth of the uterus), are associated with an increased risk of childhood asthma. Another study reported that delivery procedures such as Cesarean section, the use of vacuum extraction or forceps also raised the risk of childhood asthma.

In both adults and children, the incidence of obesity and asthma has been increasing over recent years. Studies report a strong association between the two conditions. Some experts suggest that excess weight pressing on the lungs may trigger the hyperreactive response in the airways typical of asthma. Others believe that asthma leads to obesity by inhibiting physical activity, although several studies have found no difference in activity levels between people with or without asthma. Some studies suggest that many obese people may be misdiagnosed as having asthma when they are simply short of breath, possibly because of the increased effort required for breathing.

In any case, there is evidence that losing weight can relieve asthma symptoms. Some evidence also suggests that people who are overweight (body mass index greater than 25) have more difficulty getting their asthma under control. Weight loss in anyone who is obese and has asthma or shortness of breath reduces airway obstruction and improves lung function. [See In-Depth Report #53: Weight control and diet.].

Damp Homes. Studies suggest that children who live in damp homes have a much higher risk for asthma.

Mental Health. Research indicates that poor mental health of parents and children are significant predictors of more severe symptoms in childhood asthma. A 2000 study suggested that high stress levels can predict the onset and severity of asthma in children genetically at risk for the condition.

Symptoms

In children with asthmatic symptoms, it is important to first consider as a possible cause inhaled foreign objects such as peanuts; viral infections such as croup; and bacterial infections, which may be accompanied by high fever and progress rapidly. Any child who has frequent coughing or respiratory infections should be checked for asthma.

The classic symptoms of an asthma attack include:

Wheezing when breathing out is nearly always present during an attack. Usually the attack begins with wheezing and rapid breathing, and, as it becomes more severe, all breathing muscles become visibly active.
Shortness of breath (dyspnea). Shortness of breath is a major source of distress in patients with asthma, although severe dyspnea does not always reflect a serious attack or reduced lung function.
Coughing. In some people, the first symptom of asthma is a nonproductive cough.
Chest tightness or pain. Initial chest tightness without any other symptoms may be an early indicator of a serious attack.
Neck muscles may tighten, and talking may become difficult or impossible.
Rapid heart rate
Sweating
Chest pain occurs in about 75% of patients. It can be very severe, although its intensity is not necessarily related to the severity of the asthma attack itself.

The end of an attack is often marked by a cough that produces thick, stringy mucus. After an initial acute attack, inflammation persists for days to weeks, often without symptoms. (The inflammation itself must still be treated, however, because it usually causes relapse.)

Diagnosis

The doctor will consider a diagnosis of asthma if a child has a history of periodic attacks of shortness of breath, coughing, and wheezing, perhaps accompanied by tightness in the chest. The parent should describe the pattern of symptoms and possible precipitating factors, including:

Whether symptoms are more frequent during the spring or fall (allergy seasons)
Whether exercise, a respiratory infection, or exposure to cold air has ever triggered an attack
Any family history of asthma or allergic disorders such as eczema, hives, or hay fever

A number of disorders may cause some or all of the symptoms of asthma. Panic disorder can coincide with asthma or be confused with it. Other diseases that must be considered during diagnosis are pneumonia, bronchitis, severe allergic reactions, psychosomatic illnesses, and certain rare disorders (such as tapeworm and trichomoniasis).

If symptoms and a patient's history are indicative of asthma, the doctor will usually perform tests known as pulmonary function tests to confirm the diagnosis and determine the severity of the disease.

Using a spirometer, an instrument that measures the air taken into and exhaled from the lungs, the doctor will determine several values:

Vital capacity (VC), which is the maximum volume of air that can be inhaled or exhaled.
Peak expiratory flow rate (PEFR), commonly called the peak flow rate, which is the maximum flow rate that can be generated during a forced exhalation.
Forced expiratory volume (FEV1), the maximum volume of air expired in 1 second.

If the airways are obstructed, these measurements will fall. Depending on the results, the doctor will take the following steps:

If measurements fall, the doctor typically asks the patient to inhale a bronchodilator. This drug is used in asthma to open the air passages. The measurements are taken again. If the measurements are more normal, the drug has most likely cleared the airways, and a diagnosis of asthma is strongly suspected.
If measurement results fail to show airway obstruction, but asthma is still suspected, the doctor may perform a challenge test. It involves administering a specific drug (histamine or methacholine) that usually increases airway resistance only when asthma is present.

The patient may be given skin or blood allergy tests, particularly if a specific allergen is suspected and available for testing. Allergy skin tests may be the best predictive test for allergic asthma, although they are not recommended for people with year-round asthma.

One of the most common methods of allergy testing is the scratch test or skin prick test. The test involves placing a small amount of the suspected allergy-causing substance (allergen) on the skin (usually the forearm, upper arm, or the back), and then scratching or pricking the skin so that the allergen is introduced under the skin surface. The skin is observed closely for signs of a reaction, which usually includes swelling and redness of the site. With this test, several suspected allergens can be tested at the same time, and results are usually available within about 20 minutes.

Tests that either rule out other diseases or obtain more information about the causes of asthma include the following:

A complete blood count
Chest and sinus x-rays
Computed tomography (CT) scans. CT scans may be helpful in certain cases, such as for determining wall thickness in airways in patients who are difficult to treat, which could signify a higher risk for lung damage.
Examination of the patient's sputum for eosinophils (white blood cells that in high levels are associated with severe allergic asthma).
Researchers are investigating measurements of certain chemicals in sputum or exhaled air that indicate airway inflammation. Such chemical markers include nitric oxide and hydrogen peroxide. For example, high levels of nitric oxide may prove to be a simple and noninvasive way of diagnosing asthma.

Treatment

Treating an Acute Attack in the Hospital. An acute attack may require hospitalization. Laboratory tests, an electrocardiogram (ECG), and a chest x-ray are performed to determine lung function, oxygen levels, and other indications of severity or rule out other causes. Depending on the results, the following treatments may be given:

Beta2-agonists are the standard therapy. They are typically administered with a nebulizer (a device that administers the drug in a fine spray). Studies suggest, however, that even very small children may be able to use metered-dose inhalers (MDIs), which are just as effective and more convenient than nebulizers. (Intravenous delivery is not recommended in most cases.)
An anticholinergic drug (ipratropium) is sometimes added to improve symptoms.
A corticosteroid (commonly called a steroid) given within the first hour helps reduce the need for hospitalization. Steroids may be administered intravenously, as a shot, or orally. Children may respond well to oral steroids.
Oxygen is usually administered, and can be life saving in severe cases.
Infusions of magnesium sulfate open airways and are an important emergency treatment for adults. Its benefits for children need to be further demonstrated.
In life-threatening situations, the patient may require mechanical ventilation.

Antibiotics are not useful for asthma attacks if there is no strong evidence of the presence of a bacterial infection. Viral infections, most often colds and the flu, are more likely to trigger an asthma attack. In such cases, antibiotics are not helpful and may have adverse effects.

Discharge and Relapse After Hospitalization. It typically takes about 3 - 4 hours to determine if a patient can be safely sent home or if they need to stay. Patients are generally discharged when:

Symptoms are gone or minimal, and
The peak expiratory flow rate is 70% or more of the predicted rate

Despite reasonable precautions, between 12 - 16% of patients relapse within 2 weeks of leaving the hospital. Receiving a steroid shot at discharge or taking an oral corticosteroid for a few days can reduce this risk.

Avoiding allergens, following appropriate drug treatments, and home monitoring are key elements in preventing dangerous asthma attacks and hospitalization. In addition, good communication between the doctor and patient is a key factor in a successful management program.

Medications for asthma fall into two categories:

Rescue Medications. Medications that open the airways (bronchodilators, or inhalers) are used to quickly relieve any moderate or severe asthma attack. These drugs are usually short-acting beta-adrenergic agonists (beta2-agonists). Other drugs used in special cases include corticosteroids taken by mouth and anticholinergic drugs. None of these drugs have any effect on the disease process itself. They are only useful for treating symptoms.
Maintenance Medications. Simply coping with asthma symptoms without also controlling the damaging inflammatory response is a common and serious error. For adults and children over age 5 with moderate-to-severe persistent asthma, experts now recommend inhaled corticosteroids and long-acting beta2-agonists.

Parents can greatly reduce the frequency and severity of their children’s asthma attacks by understanding the difference between coping with asthma attacks and controlling the disease over time. Unfortunately, many patients do not understand the difference between medications that provide rapid, short-term relief and those that are used for long-term symptom control. Many patients with moderate or severe asthma overuse their short-term medications and underuse their corticosteroid medications. The overuse of bronchodilators can have serious consequences; not using steroids can lead to permanent lung damage.

Patients need to understand that asthma symptoms can change quickly over time and that treatment strategies may need to change in response. In 2005, the two leading U.S. allergy associations published joint guidelines on controlling asthma. The guidelines emphasize that asthma treatment decisions need to be made on an individual basis. It is important that patients have a close relationship with their doctor. The doctor needs to evaluate a patient’s asthma symptoms at each visit to determine any need for changes in medication. According to the guidelines, asthma management is classified as either “well-controlled” or “not well-controlled.” The doctor may need to change some medications, or increase or decrease the dosage, depending on whether a child’s asthma is well-controlled or not well-controlled.

These are the signs of well-controlled asthma:

Asthma symptoms occur twice a week or less
Rescue bronchodilator medication is used twice a week or less
Symptoms do not cause nighttime or early morning awakening
Symptoms do not limit work, school, or exercise activities
Peak flow meter readings are normal or the patient’s personal best
Both the doctor and the patient consider the asthma to be well controlled


Classification	Symptom Frequency	Children Age 5 Years and Younger: Recommended Treatment	Children Older Than 5 Years: Recommended Treatment
Mild intermittent	At least 2 days per week. At least 2 nights per month.	No daily medication.	No daily medication. If severe attacks occur, systemic corticosteroids recommended.
Mild Persistent	More than 2 days per week, but less than once per day. More than 2 nights per month.	Preferred treatment: Low-dose inhaled corticosteroids with nebulizer, or MDI with holding chamber with or without face mask. Alternative treatment: Cromolyn or leukotriene-antagonist.	Preferred treatment: Low-dose corticosteroids. Alternative treatment: Cromolyn, leukotriene modifier, nedocromil, OR sustained release theophylline.
Moderate Persistent	Daily daytime symptoms. More than 1 night per week.	Preferred treatment: Low-dose inhaled corticosteroids and long-acting beta2-agonists OR medium-dose inhaled corticosteroids. Alternative treatment: Low-dose inhaled corticosteroids and either leukotriene receptor antagonist or theophylline. If needed (especially if severe attacks occur): Medium-dose inhaled corticosteroids and long-acting beta2-agonists; medium-dose inhaled corticosteroids and either leukotriene receptor antagonist or theophylline.	Preferred treatment: Low-to-medium dose inhaled corticosteroids and long-acting beta2-agonists. Alternative treatment: Low-to-medium dose inhaled corticosteroids and either leukotriene receptor antagonist or theophylline, or increased medium dose inhaled corticosteroids. If needed (especially if severe attacks occur): Increase dosage of medium-dose inhaled corticosteroids with add-on long-acting beta2-agonists. Alternatively, increase dosage of medium-dose inhaled corticosteroids plus either leukotriene receptor antagonist or theophylline.
Severe Persistent	Continual daytime symptoms. Frequent nighttime symptoms.	Preferred treatment: High-dose inhaled corticosteroids and long-acting beta2-agonists plus (if needed) oral corticosteroids.	Preferred treatment: High-dose inhaled corticosteroids combined with long-acting inhaled beta2-agonists. Add, if needed: Oral corticosteroids. Repeat attempts should be made to reduce use of systemic corticosteroid and maintain control with inhaled corticosteroid.
Adapted from National Asthma Education and Prevention Program (NAEPP) Expert Panel Report: Guidelines for the Diagnosis and Management of Asthma – Update on Selected Topics 2002 (EPR-2 Update).

Most asthma drugs are inhaled using various forms of inhalers or nebulizers. Inhaled drugs must be used regularly as prescribed and the patient carefully trained in their use in order for them to be effective and safe. Studies suggest that many children fail to use the devices properly, although newer devices are easier to use than others. The basic devices are the metered-dose inhaler (MDI), breath-actuated inhalers, dry powder inhalers, and nebulizers.

MDIs have used chlorofluorocarbons (CFCs) as their propellants. CFCs are damaging to the environment and are now being replaced with other propellants (hydrofluoroalkane) that are more environmentally safe, and do not chill the device as CFCs do. Devices that don't use any propellants are also now available.

Metered-Dose Inhaler. The standard device for administering any asthma medication is the metered-dose inhaler (MDI). This device, particularly when used with a spacer, allows precise doses to be delivered directly to the lungs. (The spacer is a tube that is attached to the inhaler. It serves as a holding chamber for the medication that is sprayed by the inhaler.) MDI-delivered drugs must be used regularly as prescribed and the patient carefully trained in their use in order for them to be effective and safe. Some patients hold the MDI too close to their mouths, or even inside them. Others may exhale too forcefully before inhalation.

The spacer helps improve medication delivery by allowing the patient additional time to inhale. They vary, however, in their effectiveness. It should be noted that MDIs can continue to deliver propellant even after the drug has been used up. Patients should track their medicine and throw the device away when the last dose has been administered.

Nebulizers (not MDIs) are typically used in very small children, both at home and in the emergency room. However, recent studies suggest spacers may be better than nebulizers for children and shorten the time spent in emergency rooms. Studies also indicate that with the use of a face mask and a spacer, the MDI works well even for infants in the emergency room and may prove to be useable at home.

Click the icon to see an illustrated series detailing a metered dose inhaler.

Breath-Actuated Inhalers. Breath-actuated rotary inhalers (Easi-Breathe and Autohaler) deliver the drug directly to the back of the throat as the user inhales. Their primary advantage over the MDI is their ease of use. They also do not use CFCs as propellants. In comparison studies, patients have been very successful with the breath-actuated inhalers. They are not recommended for children under 8 years old.

Dry Powder Inhalers. Dry powder inhalers (DPIs) deliver a powdered form of beta2-agonists or corticosteroids directly into the lungs. Such devices include Rotahaler, Spinhaler, Turbohaler, Clickhaler, Easyhaler, Diskhaler, Discus, Twisthaler, Spiros, and others. DPIs are as effective as the older devices, and generally have a better taste and are easier to manage. They may differ among themselves, however, in their ability to deliver drugs into the airways. In one study, for example, the Turbohaler was easier to use than the Diskhaler and so achieved better delivery.

Humidity or extreme temperatures can affect DPIs' performance, so they should not be stored in humid places (bathroom cabinets) or locations subject to high temperatures (glove compartments during summer months).

Dry-powder may cause tooth erosion. Children are advised to rinse their mouths out right after using these inhalers and to brush twice a day with a fluoride toothpaste.

Other Hand-Held Inhalers. Respimat delivers a fine-mist spray that is created by forcing the liquid medication through nozzles. It does not use any propellant.

Nebulizers. A nebulizer is a machine that delivers a fine spray of medication-containing liquid. Nebulizers are often used for children younger than 3 years and sometimes for older children who have difficulty using the MDI. It takes 5 - 10 minutes to administer medication using a nebulizer. Because the spray is less targeted than with the inhaler, it must deliver large amounts of the drug. This increases the risk for toxicity and severe side effects. Nebulizers should not be used by children who can manage an inhaler. Their use has been associated with a higher rate of hospitalizations and longer duration of symptoms than inhalers. A 2007 study also suggested that the misuse of home nebulizers may be an important factor in asthma deaths in children and young adults. If children must use an albuterol nebulizer, parents should be sure that it does not contain the preservative benzalkonium, which actually narrows the airways.

Click the icon to see an illustrated series detailing the use of a nebulizer.

Asthma triggers a vicious emotional-physical cycle:

Breathlessness and wheezing incite a fear of suffocation and death, even in very small children.
This anxiety produces further constriction on the muscles surrounding the airways, which makes breathing even more difficult.

Caregivers must first focus on alleviating their own anxiety, which can heighten a child's own fears. The next step is to help the child relax. One method for this is as follows:

The child sits comfortably, bending slight forward with the eyes closed.
The hands are placed gently over the navel.
The child is then told to pretend the stomach is a balloon.
The "balloon" must be "blown up" by inhalation, not exhalation. The child can tell if this working because the hands will move slightly apart.
When the child breathes out, the "balloon" will be made flat.

This exercise both relaxes the child and discourages shallow, oxygen-poor breathing. Massaging the child in gentle circles on the chest is relaxing and may also loosen mucus.

Other recommendations include:

A child may also find relief by lying stomach-down on several pillows so that the head is slightly lower than the chest while the caregiver gently pats the back between the shoulder blades.
Warm liquids, such as soup or hot cider, are effective in loosening mucus and may also relax bronchial muscles. Cold fluids, like cold air, should be avoided.
Overhydration (too much liquid) can be harmful, however, so these drinks should not be forced on the child.
Warm, moist air from vaporizers can greatly ease and moderate asthma attacks.
Daily massages and breathing and relaxation techniques to reduce stress can be very helpful.

Many adults self-manage their asthma using daily monitoring of peak air flow with adjustments of the medications as needed. This involves the use of a peak flow meter, which measures peak expiratory flow rate (PEFR).

Click the icon to see an image of a peak flow meter.

Studies suggest, however, that for most children with asthma, an educational program is just as effective for managing the condition as monitoring. Most children do not need to monitor their peak air flow on any regular basis.

Quick-Relief Medications

These medications quickly control acute asthma attacks.

Beta2-agonists do not reduce inflammation or airway responsiveness but serve as bronchodilators, relaxing and opening constricted airways during an acute asthma attack. A short-acting inhaled beta2-agonist, taken as needed, is often the only medication used by children with chronic mild asthma.

Asthma is a disease in which inflammation of the airways causes airflow into and out of the lungs to be restricted. When an asthma attack occurs, mucus production is increased, muscles of the bronchial tree become tight, and the lining of the air passages swells, reducing airflow and producing the characteristic wheezing sound.

Specific short-acting beta2-agonists include:

Albuterol (Proventil, Ventolin), called salbutamol outside the U.S., is the standard short-acting beta2-agonist in America. Other similar beta2-agonists are isoproterenol (Isuprel, Norisodrine, Medihaler-Iso), metaproterenol (Alupent, Metaprel), pirbuterol (Maxair), terbutaline (Brethine, Brethaire, Bricanyl), and bitolterol (Tornalate). Isoetharine (Bronkometer, Bronkosol) is available in nebulizers.
Newer beta2-agonists, including levalbuterol (Xopenex), have more specific actions than the standard drugs. Xopenex is administered with a nebulizer, and studies have indicated that it is as effective as albuterol with fewer side effects. The original formulation of Xopenex was administered with a nebulizer. A new metered-dose inhaler formulation was launched at the end of 2005. It is approved for children age 4 years and older.

Short-acting bronchodilators are generally administered through inhalation and are effective for 3 - 6 hours. They relieve the symptoms of acute attacks, but they do not control the underlying inflammation. If asthma continues to worsen with the use of these drugs, a doctor may prescribe corticosteroids or other drugs to treat underlying inflammation.

Side Effects of Beta2-Agonists. Side effects of all beta2-agonists may include:

Anxiety
Tremor
Restlessness
Headache
Fast and irregular heartbeats. A doctor should be notified immediately if this side effect occurs.
These drugs should be taken with caution by children with diabetes or a history of seizures.
Beta2-agonists have serious interactions with certain drugs and parents should tell the doctor about any other medications their child is taking.

Loss of Effectiveness and Overdose. There has been some concern that short-acting beta2-agonists become less effective when taken regularly over time, increasing the risk for overuse. Over time, some patients may become tolerant to many effects of short-acting beta2-agonists. The degree to which this affects the airways is uncertain. In some studies, the duration of action has declined but the peak effect appears to be preserved, making these drugs still useful for acute attacks. Regular use of long-acting beta2-agonists may increase the chances of a reduced effect from the short-acting forms.

A 2005 landmark study suggested that patients’ differing clinical response to albuterol may be based on their genotype. Albuterol targets the beta-adrenergic receptor. In the Beta-Adrenergic Response by Genotype (BARGE) trial, researchers studied the effects of albuterol on patients with two different forms of this receptor. The results suggested that patients with the arginine form of the receptor did not respond to albuterol. These patients’ asthma symptoms actually improved when albuterol was not used. By contrast, patients with the glycine form of the receptor had improved asthma control with albuterol.

Inhaled ipratropium bromide (Atrovent) acts as a bronchodilator over time. Ipratropium bromide alone is only modestly beneficial for acute asthma attacks. In fact, the drug is not approved specifically for asthma. Some parents report benefit for treating wheezing in infants. It is also sometimes used in the emergency room to treat children with severe asthma to enhance the effects of intravenous beta2-agonists.

Common oral corticosteroids include prednisone/prednisolone, dexamethasone, methylprednisolone, and hydrocortisone. They reduce inflammation very effectively. A 2006 study indicated that oral prednisolone worked better than inhaled fluticasone for treating mild-to-moderate asthma attacks in children in emergency rooms. However, children often have difficulty taking these drugs because they have a bitter taste and can cause vomiting. Taking oral dexamethasone for 2 days may be as effective and more tolerable than the standard 5-day regimen of prednisone/prednisolone. Prolonged use of oral steroids has widespread and sometimes serious side effects, so they are not generally give to children for longer than a few days.

[See In-Depth Report #4: Asthma in adults.]

Long-Term Relief Medications

These medications are taken on a regular basis to prevent asthma attacks and control chronic symptoms.

Corticosteroids, also called glucocorticoids or steroids, are powerful anti-inflammatory drugs. Steroids are not bronchodilators (they do not relax the airways) and have little effect on symptoms. Instead, they work over time to reduce inflammation and prevent permanent injury in the lungs. They can also help prevent asthma attacks from occurring. Many studies have shown that the use of inhaled corticosteroids in patients with moderate-to-severe asthma significantly reduces the rate of rehospitalizations and deaths from asthma.

Inhalation of corticosteroids makes it possible to provide effective local anti-inflammatory activity in the lungs with minimal systemic effects. (By contrast, oral steroids have considerable side effects throughout the body.) Inhaled corticosteroids are recommended as the primary therapy under the following circumstances:

For any asthmatic condition more serious than occasional episodes of mild asthma. (Low-doses of inhaled steroids may even be safe and effective for some people with mild asthma, particularly those who find themselves using beta2-agonists daily.)
When treatment with bronchodilators is not effective.

Examples of inhaled corticosteroids:

Inhaled steroids include fluticasone (Flovent), budesonide (Pulmicort), triamcinolone (Azmacort and others), and flunisolide (AeroBid). In general, the newer drugs are more powerful than the older generation of inhaled drugs. Budesonide (Pulmicort Respules) is available in a jet nebulizer for children from 12 months to 8 years. It is the first such medication to be approved for children in this age group.
The FDA approved a new inhaled corticosteroid, mometasone furoate (Asmanex) was approved in 2005 for patients age 12 and older.
The older corticosteroid inhalants are beclomethasone (Beclovent, Vanceril) and dexamethasone (Decadron Phosphate Respihaler and others). They are less powerful than the newer steroids when delivered with standard inhalers. New inhalers that use very fine sprays (QVAR, Autohaler) to deliver the drugs deep into the lungs may prove to be as effective as the newer, more potent steroids.
Inhalers that combine both long-acting beta2-agonists and corticosteroids are also available. These include Symbicort (budesonide/formoterol), which was approved in 2006 for patients ages 12 years and older.

Expert guidelines recommend inhaled corticosteroids as the preferred first-line therapy for children with mild-to-moderate asthma. Nevertheless, they are still significantly underprescribed in the patients who need them most. An important 2007 study of 6 - 14 year old children with asthma compared inhaled corticosteroid therapy (fluticasone) with an inhaled corticosteroid/long-term beta2 agonist (fluticasone/salmeterol) and a leukotrine receptor antagonist (montelukast). The results indicated that fluticasone alone worked better than the other two treatments.

Researchers have been investigating whether early treatment with corticosteroids can help prevent the development of asthma in at-risk children. Two important 2006 studies in the New England Journal of Medicine suggested that while inhaled corticosteroids helped ease symptoms and reduce breathing problems in pre-school children at risk for asthma, they did not help protect against asthma development.

For now, experts caution against corticosteroids for infants and toddlers with mild asthma and urge close monitoring especially for children under age 5 with severe asthma who are receiving high doses. Because the newer potent drugs, particularly fluticasone, may produce major side effects similar to oral steroids, it is important when treating all children to aim for the lowest effective dose possible. Fortunately, studies suggest that low doses of fluticasone may achieve the same benefits as with high ones, thus reducing risks for serious side effects. Better delivery methods may also allow lower doses.

Side effects of inhaled steroids may include:

The most common side effects are throat irritation, hoarseness, and dry mouth. These effects can be minimized or prevented by using a spacer device and rinsing the mouth after each treatment.
Rashes, wheezing, facial swelling (edema), fungal infections (thrush) in the mouth and throat, and bruising are also possible but not common with inhalators.
Some children experience changes in mood, memory, and behavior. These changes are not permanent.
Some studies have suggested a higher risk for gum inflammation.
Oral steroids reduce bone density. Research reports that inhaled steroids -- both older and newer drugs -- may also affect bone growth and density. However, a number of studies report only a slight effect (about half an inch) on children's growth, which may be only temporary. It is still unknown if these drugs have any significant long-term effect on bone density. Calcium supplements may help prevent bone loss that is due to inhaled steroids.
It is not yet known whether inhaled steroids affect lung growth in very young children. Steroids administered using nebulizers are of particular concern.
There is also some concern that the stronger drugs, particularly fluticasone, suppress the adrenal system to a greater degree than other steroid inhalants. This effect, in turn, reduces levels of natural steroids -- notably cortisol, the major stress hormone. (This is a serious side effect of oral steroids).

Long-acting beta2-agonists are used in combination with inhaled corticosteroids for treating children with moderate-to-severe asthma. These drugs include include salmeterol (Serevent Diskus) and formoterol (Foradil Aerolizer). A single inhaler (Advair Diskus) that combines both salmeterol and the corticosteroid fluticasone is available for children age 4 years and older, and an inhaler (Symbicort) combining formoterol and the corticosteroid budesonide is approved for children age 12 years and older.

Long-acting beta2-agonists are used for preventing an asthma attack (not for treating attack symptoms). The effects of one dose of a long-acting beta2-agonist last for about 12 hours, so they are particularly effective during the night. These drugs also may be used for prevention of exercise-induced asthma in people and to protect against aspirin-induced asthma.

However, research indicates that long-acting beta2-agonists can worsen asthma by increasing symptom severity. These drugs may also increase the risk for asthma-related deaths. Experts are still trying to determine when long-acting beta2-agonists should be added to an asthma treatment plan. If a child’s symptoms do not improve or if symptoms worsen with this type of drug, the doctor will recommend discontinuing it. Patients should not, however, stop taking this drug or other asthma medications without first talking with their doctors.

Side Effects. Side effects of long-acting beta2-agonists are similar to the short-acting drugs.

Specific Warning on Salmeterol and Formoterol. In 2003 a "black box" warning was added to product packaging for drugs that contain salmeterol, including Serevent Diskus, and Advair Diskus. Serevent and Advair are approved for patients age 12 years and older. The warning was based on a study that demonstrated more serious and even fatal asthma episodes in patients who used the drug than in patients who used a placebo.

In 2006, the FDA updated the warning to include formoterol (Foradil Aerolizer, approved for patients 5 years and older). Warnings for salmeterol and formoterol products emphasize that these medicines can increase the risk of severe asthma episodes. Long-acting beta2-agonists require up to 20 minutes to achieve effectiveness, and there is a danger of overdose if a patient is not aware of this delay and takes additional doses to achieve faster relief. The FDA recommends that patients:

Use long-acting beta2-agonists only if other medicines (such as steroids) have not helped control asthma.
Use a short-acting bronchodilator, not a long-acting beta2-agonist, to treat sudden wheezing.
Do not use long-acting beta2-agonists to treat wheezing that is getting worse. Call your doctor if this situation occurs.
Do not stop using any asthma medicines without first talking to your doctor.

Cromolyn sodium (Intal) is both an anti-inflammatory drug and has antihistamine properties that block asthma triggers such as allergens, cold, or exercise. Cromolyn has been the anti-inflammatory drug of choice for prevention of asthma attacks in children over age 4 with chronic moderate asthma. It is not as effective as inhaled corticosteroids, however, for reducing hospitalization rates, improving symptoms, and reducing the use of beta2-agonists in children with persistent asthma. Still, cromolyn has a well-known long-term safety record, while the long-term adverse effects of corticosteroids in children are still not fully known. Many children who need asthma maintenance therapy will still do well on cromolyn. (It may not provide any real benefit for children under age 4.)

Nedocromil (Tilade) is similar to cromolyn and needs to be taken only once a day. It also prevents asthmatic reactions to cold and exercise. It is not used in very young children. A cromolyn nasal spray called Nasalcrom has been approved for over-the-counter purchase, but only to relieve nasal congestion caused by allergies. Patients should not use it for self-medication without the advice of a doctor.

Side Effects. Side effects of cromolyn include nasal congestion, coughing, sneezing, wheezing, nausea, nosebleeds, and dry throat. Nedocromil has an unpleasant taste, and some people have complained of nausea, headache, and spasms in the airways, but no serious side effects have been reported.

Leukotriene-antagonists (also called anti-leukotrienes or leukotriene modifiers) are oral medications that block leukotrienes. Leukotrienes are powerful immune system factors that, in excess, produce a battery of damaging chemicals that can cause inflammation and spasms in the airways of people with asthma. As with other anti-inflammatory drugs, leukotrienes are used for prevention and not for treating acute asthma attacks.

Leukotriene-antagonists include zafirlukast (Accolate), montelukast (Singulair), zileuton (Ziflo), and pranlukast (Ultair, Onon). These drugs are proving helpful for long-term prevention of asthma, including exercise-induced asthma and aspirin (or NSAID) -induced asthma. However, most studies to date have reported better success with inhaled corticosteroids than with the leukotriene-antagonists. A 2006 study of children with mild-to-moderate persistent asthma indicated that the corticosteroid fluticasone worked better than the leukotriene-antagonist montelukast in controlling symptoms. Nevertheless, some studies suggest that montelukast, which comes in a chewable tablet, may be particularly useful for managing asthma in small children (ages 2 - 5), since they have trouble with inhaled steroids.

Side Effects and Complications. Gastrointestinal distress is the most common side effect of leukotriene-antagonists. Very few other side effects have been reported. In general, these drugs appear to be safe and well-tolerated.

Of some concern are reports of Churg-Strauss syndrome in a few people taking zafirlukast or montelukast. Churg-Strauss syndrome is very rare, but it causes blood vessel inflammation in the lungs and can be life threatening. Oral steroids quickly resolve the problem. In fact, usually the syndrome has occurred in patients who were tapering off steroids and changing over to the leukotriene-antagonists. Some experts believe that, in such cases, the steroids may simply have masked the presence of the disorder, which then developed when the steroid drugs were withdrawn. Symptoms include severe sinusitis, flu-like symptoms, rash, and numbness in the hands and feet.

Other concerns are indications of liver injury in patients taking zileuton and zafirlukast when taken at higher than standard doses. No adverse effects on the liver have been reported to date with montelukast.

Theophylline (Theo-Dur, Theolair, Slo-Phyllin, Slo-bid, Constant-T, Respbid) is a mild-to-moderate bronchodilator that has been used to treat childhood asthma for more than 30 years. It is useful for treating nocturnal asthma and may also have anti-inflammatory qualities even in low doses.

Available in tablet, liquid, and injectable forms, some theophylline sustained-release tablets and capsules have a long duration of action and can therefore be taken once or twice a day with good results.

Side effects may include changes in behavior, mood, and memory. If theophylline is not taken exactly as prescribed, an overdose can easily occur. Toxicity can cause nausea, vomiting, headache, insomnia, and, in rare cases, disturbances in heart rhythm and convulsions. Contact a doctor immediately if any of these side effects occur.

The risks for these adverse effects are small if the drug is taken exactly as prescribed but the following precautions should be noted:

Infants tend to metabolize the drug extremely slowly and, therefore, should receive very low doses.
By the time children reach age 1, however, they metabolize the drug faster than adults. There is a risk, therefore, of toxic effects.
Fever and certain antibiotics may slow down the rate at which theophylline is eliminated from the body. In such cases, the doctor may want to reduce the dosage of theophylline.

If a child is taking theophylline on an ongoing basis, the doctor should monitor the drug level at the start of therapy and at regular intervals thereafter.

Omalizumab (Xolair) is FDA-approved for patients age 12 and older who have moderate-to-severe persistent asthma related to allergies. The first drug of this type to be approved for asthma, omalizumab is a monoclonal antibody (MAb), a genetically developed drug designed to attack very specific targets. Omalizumab is administered by injection every 2 - 4 weeks. It is used only to treat patients whose symptoms are not controlled by inhaled corticosteroids.

Omalizumab prevents the antibody immunoglobulin E (IgE) from triggering the inflammatory events that lead to asthmatic attacks. Studies have shown excellent benefits of the drug, including a reduced need for corticosteroids, fewer hospitalizations, and significant symptomatic improvements.

However, about 1 in 1,000 patients who take omalizumab develop anaphylaxis (a life-threatening allergic reaction). In 2007 the FDA requested the manufacturers of omalizumab to put a “boxed warning” on the medicine’s label emphasizing the drug’s risk for anaphylaxis. The boxed warning notes that patients can develop anaphylaxis after any dose of omalizumab, even if they had no reaction to a first dose. Anaphylaxis may occur up to 24 hours after the dose is given.

The FDA recommends that healthcare providers observe patients for at least 2 hours after an injection. Patients should also carry emergency self-treatment for anaphylaxis (such as an Epi-Pen) and know how to administer it. With an Epi-Pen, or similar auto-injector device, patients can quickly give themselves a life-saving dose of epinephrine.

Anaphylaxis symptoms include:

Difficulty breathing
Chest tightness
Dizziness
Fainting
Itching and hives
Swelling of the mouth and throat

[See In-Depth Report #4: Asthma in adults.]

Other Treatments

Alternative therapies are widely used by children, adolescents, and adults with asthma. In one study, nearly half of asthma or allergy sufferers resorted to alternative treatments. To date, however, evidence does not support most alternative therapies, including high-dose vitamins, urine injections, homeopathic remedies, and most herbal remedies.

Relaxation and Stress-Reduction Techniques. Patients report benefits from many stress reduction and physical techniques, such as acupuncture, hypnosis, breathing relaxation techniques, the Alexander technique, massage therapy, and meditation practices. There have been very few well-conducted studies supporting their use, however.

Acupuncture, hypnosis, and biofeedback are alternative ways to control pain. Acupuncture involves the insertion of tiny sterile needles, slightly thicker than a human hair, at specific points on the body.

Breathing Exercises. Some studies have suggested that breathing exercises or training may be helpful. A number of different methods are available. One example is the Buteyko breathing method, an experimental approach designed to increase levels of carbon dioxide in the body. To do this, patients are trained to reduce their volume of breath and to avoid hyperventilation (over-breathing). Some studies report that patients using this method reduce their use of medications and improve their quality of life. The system originated in Australia and is not yet widely available in the U.S.

Probiotics. Probiotics are beneficial bacteria that may possibly help protect against allergies and asthma. Antibiotic overuse and modern hygiene may specifically be reducing these helpful organisms. Look for probiotics in active yogurt cultures and in supplements, which are being studied for protection.

Herbal Remedies. Butterbur (also known as Petasites hybridus, butter dock, blatterdock, bog rhubarb, and exwort), is a traditional herbal remedy used for seasonal allergies and asthma. In a 2002 study, it was as effective and less sedating than a commonly prescribed antihistamine for treating seasonal allergies over a 2-week period. However, little research exists on its effect on asthma. Overall, there is scant evidence supporting the benefits of herbs and nutritional supplements for asthma control.

Managing Asthma

The more allergies a child has, the more severe the asthma. Making lifestyle changes to reduce allergy attacks and other triggers is extremely important.

House dust is a reservoir for pollen and dust mites. Some experts believe that reducing household allergens and pollutants in the home could reduce asthma in children by 40%.

Controlling for Dust. Spray furniture polish is very effective for reducing both dust and allergens. Air cleaners, filters for air conditioners, and vacuum cleaners with High Efficiency Particular Air (HEPA) filters can help remove particles and small allergens found indoors. Neither vacuuming nor the use of anti-mite carpet shampoo, however, is effective in removing mites in house dust. Vacuuming actually stirs up both mites and cat allergens. If possible, avoid carpets and rugs.

Click the icon to see an image of a HEPA air filter.

Bedding and Curtains. Many experts recommend reducing exposure to dust mites by enclosing mattresses and pillows in semipermeable coverings. (Vinyl mattress covers limit airflow and may also worsen, or even cause, asthma in children. Synthetic pillows may pose a significantly higher risk for severe asthma attacks in children than feather or no pillows.) However, several 2005 studies suggested that such covers do not prevent asthma or allergies. Replace curtains with shades or blinds, and wash bedding using the highest temperature setting.

Click the icon to see an image of dust mite prevention.

One study found that children sleeping in bottom bunk beds are significantly more likely to develop asthma than siblings occupying the upper bunks. Families with children who have asthma or allergies should avoid bunk beds or be sure that children with asthma sleep in the top bunk. Even with standard beds, it may be useful to have them sleep as high off the floor as possible.

Exterminating Pests (Cockroaches and Mice). Use professional exterminators to eliminate cockroaches. (One study reported that ridding a home of cockroaches and cleaning the house using standard housecleaning techniques failed to eliminate the cockroach allergens themselves.) Exterminate mice, and attempt to remove all dust, which might contain mouse urine and dander.

Reducing Humidity in the House. Although warm, moist air from vaporizers can greatly ease and moderate asthma attacks, living in a damp house is counterproductive. Dust mites thrive in humidity and damp houses increase the risk for mold, so on-going humidifiers can be unhelpful. If they are used, humidity levels should not exceed 40%, and humidifier should be cleaned daily with a vinegar solution.

Controlling Pets. People with asthma who already have pets and are not allergic to them probably have a low risk for developing such allergies later on. When children are exposed to more than one dog or cat during their first year, they have a much lower risk for allergies and asthma.

For children who have an existing allergy to pets, however, the pets should be given away or kept outside. If this isn't possible, they should at least be confined to carpet-free areas outside the bedroom. Cats harbor significant allergens, which can even be carried on clothing; dogs usually present fewer problems. Washing animals once a week can reduce allergens. Dry shampoos, such as Allerpet, are now available for both cats and dogs to remove allergens from skin and fur and are easier to administer than wet shampoos.

Many of the same substances trigger both allergies and asthma. Common allergens include pollen, dust mites, mold and pet dander. Other asthma triggers include irritants like smoke, pollution, fumes, cleaning chemicals, and sprays. Asthma symptoms can be substantially reduced by avoiding exposure to known allergens and respiratory irritants.

Preventing Exposure to Cigarette and Cooking Smoke. Parents who smoke are strongly urged to quit. Studies indicate that exposure to second-hand smoke in the home increases the risk for asthma and asthma-related emergency room visits in children. Even smoky cooking can worsen asthma.

Parental smoking has been shown to increase the airway responsiveness of infants as early as the first 2 - 10 weeks of life. This extends even to the fetus of pregnant women who smoke. Such mothers tend to have babies born at a low birth weight, which affects lung function and increases babies' risks for asthma.

Avoiding Outdoor Allergens. The following are some recommendations for avoiding allergens outside:

Avoid scheduling camping and hiking trips during times of high pollen count (generally, May and June for grass pollen and mid-August to October for ragweed).
Patients should avoid strenuous activity when ozone levels are highest, which usually occur in early afternoon, particularly on hot hazy summer days. Levels are lowest in early morning and at dusk.
Asthma attacks are often higher during thunderstorms. Some evidence points to a build-up of ozone that accompanies such storms. Other evidence suggests that the changing airflow patterns bring a sudden downdraft of air containing concentrations of pollens, small particles and allergens.
Patients who are allergic to mold should avoid barns, hay, raking leaves, and mowing grass.
Exposure to automobile fumes may worsen asthma. Fungi in car air conditioners can also be a problem.

Reducing Exposure to Air Pollution. Children breathe faster than adults, taking in more pollutants, and therefore are particularly susceptible to soot and other small particles in the air. A 2001 study found an association between higher rates of asthma and other health problems in children who were exposed to high levels of specific pollutants (particularly sulfur dioxide and nitrogen dioxide). Diesel fuel exhaust has also been associated with worsening asthma in children.

Some experts point out that asthma rates in North America have increased over recent years while the prevalence of many common air pollutants have declined. So pollution is unlikely to be a primary cause of asthma. Regardless of whether pollution is an important cause of asthma, evidence strongly suggests that it can affect existing asthma.

Patients with asthma and chronic allergic rhinitis may require daily medications. Patients with severe seasonal allergies may be advised to start medications a few weeks before the pollen season, and to continue it until the season is over.

Immunotherapy ("allergy shots") may help reduce asthma symptoms, and the use of asthma medications, in patients with known allergies. They may also help prevent the development of asthma in children with allergies. Immunotherapy poses some risk for severe allergic reactions, especially for children with poorly controlled asthma, so it is important that the doctor carefully evaluates the child’s asthma condition.

[See In-Depth Report #77: Allergic rhinitis.]

Weight Loss. Children who are both asthmatic and overweight may reduce asthma symptoms simply with weight loss.

Fruits, Vegetables, and Whole Grains. Healthy foods are important for lung function. Specific foods that may be important for healthy lungs contain antioxidants (deep green and yellow-orange fruits and vegetables), selenium (fish, red meat, grains, eggs, chicken, liver, garlic), plant chemicals called flavonoids (apples, onions), and magnesium (green leafy vegetables, nuts, whole grains, milk, and meats).

Fish Oil. Omega-3 fatty acids, found in cold water oily fish and in supplements (preferably DHA-EPA, the important compounds in fish oil) have anti-inflammatory effects. Some evidence suggests they may be helpful for people with asthma.

Caffeine. Caffeine has properties that are similar to the asthma drug theophylline. A major analysis of studies reported that caffeine improved lung function for up to 4 hours after consumption. Although tea and coffee are the major sources of caffeine, some sodas contain it and should be avoided when children have an asthma attack. (People who are going to have their lung function tested should avoid drinking coffee, tea, or other caffeinated beverages for at least 4 hours beforehand.)

Food Allergies. Although about 70% of people with asthma believe their symptoms are aggravated by food allergies, studies indicate that this belief may be true in only 5% of cases. If young children show signs of or test positive for food allergies, however, parents should be extra cautious in preventing exposure to any asthma trigger. Some doctors now counsel all children with asthma to avoid nuts entirely, and, of course, children who experience reactions to any foods should avoid them.

Chemicals that may pose some risk for an allergic reaction are monosodium glutamate, or MSG (found in some canned soups, cheese, and certain vegetables), and sulfites (preservatives in foods, such as frozen potatoes and tuna). Contrary to what many believe, dairy products do not appear to worsen asthma symptoms in people who are not already allergic to them.

Asthma is no reason to avoid exercise. Historically, about 10% of Olympic athletes have asthma. Some studies indicate that long-term exercise may help control asthma and reduce hospitalization.

Encourage children with asthma to swim and play sports, such as baseball, that will present less difficulty for them. Intense activities lasting less than 2 minutes, such as sprinting or competitive swimming, may cause fewer problems than longer-lasting exercises.

Young people who enjoy running should probably choose an indoor track to avoid pollutants. Swimming is excellent for people with asthma. Yoga practice, which uses both stretching, breathing, and meditation techniques, may have particular benefits. One study reported that two-thirds of patients who practiced yoga regularly were able to reduce or stop taking their asthma medications.

Patients should consult their doctors before starting any exercise program. Exercise-induced asthma is a limited condition that has specific recommendations.

People with asthma should try to minimize their risk for respiratory tract infections. Washing hands is a very simple but effective preventive measure.

Patients with asthma should ask their doctor about getting the influenza ("flu") vaccine and also whether they should receive the vaccination against pneumococcal pneumonia.

Zanamivir, a new drug used for treating influenza, is considered safe for patients with asthma 12 years of age or older. In one study, patients with asthma treated with zanamivir experienced fewer flu symptoms, and their lung function improved.

People with asthma have no higher rate of anxiety or depression than the general population. However, such emotions interact with the effects of asthma and its treatments in important ways:

Negative emotions can discourage compliance with medication and the ability to cope.
Poor control of asthma symptoms, in turn, increases the risk for negative emotions.
Stress and depression have been associated with more severe symptoms and even an increased risk of fatal asthma attacks.

Some evidence suggests that stress reduction techniques, a positive attitude, and relaxation techniques may be very helpful in the long-term management of asthma.

Resources

www.lungusa.org -- The American Lung Association
www.acaai.org -- American College of Allergy, Asthma & Immunology
www.aaaai.org -- American Academy of Allergy, Asthma, and Immunology
www.nhlbi.nih.gov -- National Heart, Lung, and Blood Institute
www.asthma-carenet.org -- Childhood Asthma Research and Education Network
www.njc.org -- National Jewish Center for Immunology and Respiratory Medicine
www.aafa.org -- Asthma and Allergy Foundation of America
www.aanma.org -- Allergy and Asthma Network, Mothers of Asthmatics

References

Akinbami L; Centers for Disease Control and Prevention National Center forHealth Statistics. The state of childhood asthma, United States, 1980-2005. Adv Data. 2006 Dec 12;(381):1-24.

Bisgaard H, Hermansen MN, Loland L, Halkjaer LB, Buchvald F. Intermittent inhaled corticosteroids in infants with episodic wheezing. N Engl J Med. 2006 May 11;354(19):1998-2005.

Cates CJ, Crilly JA, Rowe BH. Holding chambers (spacers) versus nebulisers for beta-agonist treatment of acute asthma. Cochrane Database Syst Rev. 2006 Apr 19;(2):CD000052.

Douwes J, van Strien R, Doekes G, Smit J, Kerkhof M, Gerritsen J, et al. Does early indoor microbial exposure reduce the risk of asthma? The Prevention and Incidence of Asthma and Mite Allergy birth cohort study. J Allergy Clin Immunol. 2006 May;117(5):1067-73.

Guilbert TW, Morgan WJ, Zeiger RS, Mauger DT, Boehmer SJ, Szefler SJ, et al. Long-term inhaled corticosteroids in preschool children at high risk for asthma. N Engl J Med. 2006 May 11;354(19):1985-97.

Haland G, Carlsen KC, Sandvik L, Devulapalli CS, Munthe-Kaas MC, Pettersen M, et al. Reduced lung function at birth and the risk of asthma at 10 years of age. N Engl J Med. 2006 Oct 19;355(16):1682-9.

Marks GB, Mihrshahi S, Kemp AS, Tovey ER, Webb K, Almqvist C, et al. Prevention of asthma during the first 5 years of life: a randomized controlled trial. J Allergy Clin Immunol. 2006 Jul;118(1):53-61.

National Asthma Education and Prevention Program Expert Panel Report: Guidelines for the Diagnosis and Management of Asthma Update on Selected Topics -- 2002. Rockville, MD. National Heart, Lung, and Blood Institute, US Dept of Health and Human Services; 2003. NIH publications 02-5074.

O'Byrne PM, Pedersen S, Busse WW, Tan WC, Chen YZ, Ohlsson SV, et al. Effects of early intervention with inhaled budesonide on lung function in newly diagnosed asthma. Chest. 2006 Jun;129(6):1478-85.

Salpeter SR, Buckley NS, Ormiston TM, Salpeter EE. Meta-analysis: effect of long-acting beta-agonists on severe asthma exacerbations and asthma-related deaths. Ann Intern Med. 2006 Jun 20;144(12):904-12.

Schuh S, Dick PT, Stephens D, Hartley M, Khaikin S, Rodrigues L, Coates AL. High-dose inhaled fluticasone does not replace oral prednisolone in children with mild to moderate acute asthma. Pediatrics. 2006 Aug;118(2):644-50.

Sorkness CA, Lemanske RF Jr, Mauger DT, Boehmer SJ, Chinchilli VM, Martinez FD, et al. Long-term comparison of 3 controller regimens for mild-moderate persistent childhood asthma: the Pediatric Asthma Controller Trial. J Allergy Clin Immunol. 2007 Jan;119(1):64-72.

Review Date:
3/26/2007
Reviewed By:
Harvey Simon, MD, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital.

A.D.A.M. Copyright

adam.com

Asthma in adults

FitSugar — Wed, 08 Oct 2008 17:35:00 -0700

In This Report

Highlights
Introduction
Symptoms
Causes
Prognosis
Risk Factors
Diagnosis
Treatment
Quick-Relief Medications...
Long-Term Relief Medication...
Other Treatments
Managing Asthma
Resources
References

HEALTH GUIDE REFERENCE FROM A.D.A.M

Highlights

Drug Warning

In 2007, the FDA requested the manufacturers of omalizumab (Xolair) to include a “boxed warning” emphasizing that this drug may cause a severe and life-threatening allergic reaction (anaphylaxis). Omalizumab is approved for patients who have moderate-to-severe asthma related to allergies and whose symptoms are not controlled by inhaled corticosteroids. It is given by injection in a doctor’s office every 2 - 4 weeks. The warning indicates that patients may develop anaphylaxis after any dose of omalizumab, even if they had no reaction to the initial shot. Health care providers need to observe patients carefully for 2 hours after they receive an omalizumab injection. However, because an allergic reaction can occur up to 24 hours after the injection, patients need to know the signs and symptoms of anaphylaxis and how to self-administer emergency treatment.

Anaphylaxis symptoms include:

Difficulty breathing
Chest tightness
Dizziness
Fainting
Itching and hives
Swelling of the mouth and throat

Drug Approval

In 2006, the FDA approved budesonide/formoterol (Symbicort). Symbicort combines a corticosteroid and a long-acting beta2-agonist into a single inhaler.

Long-Acting Beta2-Agonists

Long-acting beta2-agonist drugs, such as salmeterol (Serevent Diskus) and formoterol (Foradil Aerolizer), may worsen asthma symptom severity and increase the risk for asthma-related death, indicates a 2006 review in the Annals of Internal Medicine.
Products that contain salmeterol and formoterol now have strengthened warning labels detailing these risks.

Asthma and Heartburn

Studies have suggested an association between heartburn, also known as gastroesophageal reflux disease (GERD), and asthma that gets worse at night (nocturnal asthma). A 2006 study tested whether a proton pump inhibitor drug might help improve morning breathing in patients who suffer from these two conditions. The results suggested that the drug provided only a moderate benefit.

Introduction

Air passes into the lungs and flows through progressively smaller airways called bronchioles. The lungs contain millions of these airways.
All bronchioles lead to alveoli, which are microscopic sacs where oxygen and carbon dioxide are exchanged.

The major features of the lungs include the bronchi, the bronchioles, and the alveoli. The alveoli are the microscopic blood vessel-lined sacks in which oxygen and carbon dioxide gas are exchanged.

Asthma is a chronic condition in which these airways undergo changes when stimulated by allergens or other environmental triggers. Such changes appear to be two specific responses:

The hyperreactive response (also called hyperresponsiveness)
The inflammatory response

These actions in the airway cause patients to cough, wheeze, and experience shortness of breath (dyspnea), the classic symptoms of asthma.

In the hyperreactive response, smooth muscles in the airways of the lungs constrict and narrow excessively in response to inhaled allergens or other irritants. Everyone's airways respond by constricting when exposed to allergens or irritants, but a special hyperreactive response occurs in people with asthma:

When people without asthma breathe in and out deeply, the airways relax and open to rid the lungs of the irritant.
When people with asthma try to take those same deep breaths, their airways do not relax and narrow, causing patients to pant for breath. Smooth muscles in the airways of people with asthma may have a defect, perhaps a deficiency in a critical chemical that prevents the muscles from relaxing.

The hyperreactive stage is followed by the inflammatory response, which generally contributes to asthma in the following way:

In response to allergens or other environmental triggers, the immune system delivers white blood cells and other immune factors to the airways.
These so-called inflammatory factors cause the airways to swell, to fill with fluid, and to produce a thick sticky mucus.
This combination of events results in wheezing, breathlessness, inability to exhale properly, and a phlegm-producing cough.

Click the icon to see an image of a normal bronchiole versus an asthmatic bronchiole.

Inflammation appears to be present in the lungs of all patients with asthma, even those with mild cases, and plays a key role in all forms of the disease.

Symptoms

Asthma symptoms vary in severity from occasional mild bouts of breathlessness to daily wheezing that persists despite taking large doses of medication. After exposure to asthma triggers, symptoms rarely develop abruptly but progress over a period of hours or days. Occasionally, the airways have become seriously obstructed by the time the patient calls the doctor.

The classic symptoms of an asthma attack include:

Wheezing when breathing out is nearly always present during an attack. Usually the attack begins with wheezing and rapid breathing, and, as it becomes more severe, all breathing muscles become visibly active.
Shortness of breath (dyspnea). Shortness of breath is a major source of distress in patients with asthma. However, the severity of this symptom does not always reflect the degree to which lung function is impaired. Some patients are not even aware that they are experiencing shortness of breath. Such patients are at particular risk for very serious and even life-threatening asthma attacks, since they are less conscious of symptoms. Those at highest risk for this effect tend to be older, female, and to have had the disease for a longer period of time.
Coughing. In some people, the first symptom of asthma is a nonproductive cough. Some patients find this cough even more distressing than wheezing or sleep disturbances.
Chest tightness or pain. Initial chest tightness without any other symptoms may be an early indicator of a serious attack.
Neck muscles may tighten, and talking may become difficult or impossible.
Rapid heart rate.
Sweating.
Chest pain occurs in about 75% of patients. It can be very severe, although the pain's intensity is not necessarily related to the severity of the asthma attack itself.

The end of an attack is often marked by a cough that produces thick, stringy mucus. After an initial acute attack, inflammation lasts for days to weeks, often without symptoms. (The inflammation itself must still be treated, however, because it usually causes relapse.)

Causes

Asthma has dramatically risen worldwide over the past decades, particularly in developed countries, and experts are puzzled over the cause of this increase. The mechanisms that cause asthma are complex and vary among population groups and even from individual to individual. Many asthma sufferers have allergies, and some researchers are targeting common factors in both these conditions. Not all people with allergies have asthma, however, and not all cases of asthma can be explained by allergic response.

Asthma is most likely to be caused by a convergence of factors that can include genes and various environmental and biologic triggers (infections, dietary patterns, hormonal changes in women, and allergens).

Nearly half of adults with asthma have an allergy-related condition, which, in most cases developed first in childhood. (In patients who first develop asthma during adulthood, the allergic response usually does not play a strong causal role.) Important irritants or allergens include:

Dust mites, specifically mite feces, which are coated with enzymes that contain a powerful allergen. These are the primary allergens in the home.
Animal dander.
Pollen. An asthma attack from an allergic response to pollen is more likely to occur during extreme air changes, such as thunderstorms. Major weather changes, such as El Nino, can affect the timing of allergy seasons. For example, in 1998, when the effects of El Nino were very strong, allergy and asthma attacks occurred earlier and were markedly increased.
Molds. A 2002 study suggested that molds might produce a worse asthma attack in adults than other allergens.
Fungi.
Cockroaches. Cockroaches are major asthma triggers and may reduce lung function even in people without a history of asthma.
Fossil Fuels. Certain chemicals may trigger allergic rhinitis. Some experts believe that refined fossil fuels, such as diesel fuel and particularly kerosene, may be important triggers for allergic rhinitis. And, in people who already have allergies or asthma, exposure to such fossil fuels may worsen symptoms.

The Allergic Process. The allergic process, called atopy, and its connection to asthma is not completely understood. It involves various airborne allergens or other triggers that set off a cascade of events in the immune system leading to inflammation and hyperreactivity in the airways. One description is as follows:

The conductor in an orchestra of immune factors that contribute to allergies and asthma appears to be a category of white blood cells known as helper T cells, in particular a subgroup called Th2 cells.
Th2 cells overproduce interleukins (ILs), immune factors that are molecular members of a family called cytokines, which are involved in the inflammatory process.
Interleukins 4, 9, and 13 may be responsible for a first-phase asthma attack. These interleukins stimulate the production and release of antibody groups known as immunoglobulin E (IgE). (People with both asthma and allergies appear to have a genetic predisposition for overproducing IgE.)
During an allergic attack, these IgE antibodies can bind to special cells in the immune system called mast cells, which are generally concentrated in the lungs, skin, and mucous membranes. This bond triggers the release of several active chemicals, importantly potent molecules known as leukotrienes. These chemicals cause airway spasms, overproduce mucus, and activate nerve endings in the airway lining.
Another cytokine, interleukin 5, appears to contribute to a late-phase inflammatory response. This interleukin attracts white blood cells known as eosinophils. These cells accumulate and remain in the airways after the first attack. They persist for weeks and mediate the release of other damaging particles that remain in the airways.

The Immune Response. Researchers are investigating the role that T cells play in asthma. T cells are white blood cells that are involved in the immune response. Researchers had focused on the T cell called type 2 helper (Th2) cells. However, a 2006 breakthrough study in the New England Journal of Medicine suggested that a different type of T cell may play a stronger role in asthma than previously thought.

Growth Factors. Compounds known as vascular endothelial growth factor (VEGF) have been observed in the airways of patients with asthma. VEGF is a powerful promoter of cell growth in blood vessel linings, and some researchers believe it may be major factor in remodeling.

About one-third of all persons with asthma share this condition with another member of their immediate family. Asthma may be more likely to pass to children from their mother than from their father. Both allergies and asthma are strongly associated with hereditary factors, sharing certain genetic markers, but they are not always inherited together.

Hormones or changes in hormone levels appear to play a role in the severity of asthma in women.

Menstrual-Related Asthma. Between 30 - 40% of women with asthma experience fluctuations in severity that are associated with their menstrual cycle. One study indicated that women with menstrually associated asthma tend to have the following characteristics:

Older age
Had asthma for a long time
Had severe asthma attacks that were likely to occur 3 days before and 4 days into the menstrual period

Oral contraceptives (OCs) theoretically should help asthma sufferers by leveling out hormonal changes, but they do not appear to have much effect. (There have been a few reports of asthma exacerbation with OCs, but these are uncommon events.)

Asthma during Pregnancy. During pregnancy, one-third of women with asthma suffer more from the condition, one-third suffer less, and one-third experience no difference in severity. Some studies suggest that expectant mothers carrying a female baby tend to have more severe asthma symptoms than do those who are bearing a male.

Menopause and Asthma. Around the time of menopause (called perimenopause) when estrogen declines, the risk for hospitalization in women with asthma increases fourfold compared to previous years. Studies have not demonstrated that hormone replacement therapy (HRT), which contains estrogen, has much benefit.

About 10% of adults and some fewer children have aspirin-induced asthma (AIA). With this condition, asthma gets worse when patients take aspirin. Aspirin is one of the drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). Although aspirin is used to reduce inflammation in other disorders, it appears to have the opposite effect in many asthma cases. It is not wholly known why this occurs. AIA often develops after a viral infection. It is a particularly severe asthmatic condition, associated with up to 25% of asthma-related hospitalizations. In about 5% of cases, aspirin is responsible for a syndrome that involves multiple attacks of asthma, sinusitis, and nasal congestion. Such patients also often have polyps (small benign growths) in the nasal passages.

Patients with aspirin-induced asthma (AIA) should avoid aspirin and most likely other NSAIDs, including ibuprofen (Advil) and naproxen (Aleve).

Exercise-induced asthma (EIA) is a limited form of asthma in which exercise triggers coughing, wheezing, or shortness of breath.

Asthma occurs primarily at night (nocturnal asthma) in as many as 75% of patients with asthma. Attacks often occur between 2 and 4 a.m. Factors that might play role in nocturnal asthma may include one or more of the following:

Chemical and temperature changes in the body during the night that increase inflammation and narrowing of the airways
Delayed allergic responses from exposure to allergens during the day
The wearing off of inhaled medications toward the early morning
An increase in acid reflux (back up of stomach acid) that causes airways to narrow
Postnasal drip that occurs during sleep
Conditions relating to sleep, such as sleep apnea or sleeping on one's back, which may worsen any asthma attack that occurs at night

Some experts believe that nocturnal asthma may actually be a unique form, with its own specific biologic mechanisms that occur only at night and which reduce natural steroid hormones (which block inflammation).

Infections. The role of infections in asthma is complicated. Respiratory infections may play a role in some cases of adult-onset asthma, but may be protective against asthma in small children. (In both children and adults with existing allergic asthma, however, an upper respiratory tract infection often worsens an attack.)

Researchers are particularly interested in the organisms Chlamydiapneumoniae and Mycoplasmapneumoniae adenovirus. They are major causes of both mild and serious respiratory infections and are becoming important suspects in many cases of severe adult asthma. (If such respiratory infections occur in young children, they are unlikely to affect adult-onset asthma.)

In one study, patients whose asthma occurred after infections had more severe conditions than those whose asthma was due to other causes. The infection-initiated asthma, however, lasted only 5.6 years compared to 13.3 years in the non-infection group.

In any age group, respiratory infections worsen existing asthma in people who have it already. Rhinovirus (the common cold virus) has been reported to be the most common infection associated with asthma attacks. In one study, it was associated with 61% of asthma exacerbations in children and 44% in adults. Some research suggests that colds promote allergic inflammation and increase the intensity of airway responsiveness for weeks.

GERD. At least half of patients with asthma have gastroesophageal reflux disease (GERD), the cause of heartburn. It is not entirely clear which condition causes the other or whether they are both due to common factors.

Heartburn is a condition where the acidic stomach contents back up into the esophagus causing pain in the chest area. This reflux usually occurs because the sphincter muscle between the esophagus and stomach is weakened. Standing or sitting after a meal can help reduce the reflux that causes heartburn. Continuous irritation of the esophagus lining as in gastroesophageal reflux disease is a risk factor for the development of adenocarcinoma.

Some theories for the causal connection between GERD and asthma are:

Acid leaking from the lower esophagus in GERD stimulates the vagus nerve, which runs through the gastrointestinal tract. This stimulated nerve triggers the nearby airways in the lung to constrict, causing asthma symptoms.
Acid backup that reaches the mouth may be inhaled into the airways (aspirated). Here, the acid triggers a reaction in the airways that cause asthma symptoms.

GERD is sometimes hard to detect and might be a contributor in the following patients:

Those who do not respond to asthma treatments
Those whose asthma attacks follow episodes of heartburn
Those whose attacks worsen after eating or exercise
Those whose coughs follow episodes of acid reflux. (One study found that GERD was associated with about half of the episodes of coughs and wheezes in patients with asthma.)

Treating GERD symptoms with anti-acid drugs may resolve asthma in some (but not all) patients who share both conditions. A small 2005 study found that while GERD was common in patients with asthma, treatment of GERD had no effect on asthma symptoms. A 2006 study indicated that the proton pump inhibitor esomeprazole (Nexium) slightly helped patients who had both GERD and asthma symptoms that occurred at night. [See In-Depth Report #85: Heartburn and gastroesophageal reflux disease.]

Click the icon to see an image of sinusitis.

EIA is triggered only by exercise and is distinct from ordinary allergic asthma in that it does not produce a long duration of airway activity, as allergic asthma does. (It should be noted that some people have both forms of asthma.) People who have only EIA do not appear to require long-term maintenance therapy. A study of military recruits with EIA also reported that the condition does not hinder a person's overall physical performance.

Medications

Cromolyn, a mild anti-inflammatory drug, or short-acting beta2-agonists have been the treatments of choice for preventing EIA. Newer approaches for people who work out regularly include pretreatment with long-acting beta2-agonists, such as salmeterol (Serevent), or the regular use of inhaled corticosteroids.

Hints for Reducing EIA

EIA occurs only after exercise and is more likely to occur with regularly paced activities in cold, dry air. The following are some suggestions for reducing its impact:

Warm-up and cool-down periods are important.
Patients with EIA might do better with activities that involve short bursts of exercise (tennis, football) than with exercises involving long-duration regular pacing (cycling, soccer, and distance running).
Breathing through a scarf or through the nose helps warm up the airways.
Some evidence suggests that restricting dietary salt might help reduce EIA.

Click the icon to see an image of exercise-induced asthma.

Prognosis

About 450,000 American adults are admitted to an emergency room with asthma each year. The number of deaths from asthma increased from about 2,900 in 1908 to a high of 5,667 in 1996. The numbers appear to be declining slightly, and in 2002 about 4,260 people died because of asthma. Death from asthma is still a very uncommon event, considering that an estimated 20 million people in the U.S. have this condition. Most deaths from asthma, even when they occur in elderly adults, are preventable. It is very rare for a person who is receiving proper treatment to die of asthma. And, studies suggest that the use of inhaled corticosteroids can reduce the risk for death by 90%. In spite of this and similar research, these important drugs are greatly underused.

About 55% of U.S. deaths from asthma occur among the elderly (over age 65), and an estimated 25% occur in adults aged 45 - 64. Women have a higher risk for fatal asthma than men. Being poor is also a significant risk factor for severe asthma. Hispanics and African Americans are at higher risk for death from asthma than Caucasians. Other specific risk factors for fatal asthma include:

Previous history of respiratory failure
Frequent visits to the emergency room
Lack of continuous care and poor compliance with medications
Having stopped treatment, particularly withdrawal from corticosteroids
Having an emotional or psychiatric disorder. (Some evidence suggests that depression, anxiety, and stressful life situations can worsen asthma.)
Being a drug abuser
Being in a lower socioeconomic and educational group

The following signs and symptoms may indicate a life-threatening situation:

As the chest labors to bring enough air into the lungs, breathing often becomes shallow.
Lacking sufficient oxygen, the skin becomes bluish.
The flesh around the ribs of the chest appears to be sucked in.
The patient may begin to lose consciousness.

It should strongly be noted that early symptoms or lack thereof do not always reflect the ultimate severity of an attack. In fact, some studies suggest that people at high risk for fatal or near-fatal asthma attacks are those with poor awareness of their own reduced ability to breathe and who are therefore slow in seeking help. Those at highest risk for this effect tend to be older, female, and have had the disease for a longer period of time. Monitoring peak flow rates is an important management component since it provides a more accurate assessment of lung function than symptoms alone.

The severity of asthma is graded using the following categories: mild intermittent and mild, moderate, and severe persistent. A patient in any of these categories, even mild intermittent, can still experience a severe and even life-threatening attack. In fact, according to one report, 30% of asthma deaths occur in patients with mild asthma.

Asthma is usually chronic, although it occasionally goes into long periods of remission. Long-term outlook generally depends on severity:

In mild-to-moderate cases, asthma can improve over time, and many adults even become symptom free.
Even in some severe cases, adults may experience improvement depending on the degree of obstruction in the lungs and the timeliness and effectiveness of treatment.
In about 10% of severe persistent cases, changes in the structure of the walls of the airways lead to progressive and irreversible problems in lung function, even in aggressively treated patients.

Lung function declines faster than average in people with asthma, particularly in those who smoke and in those with excessive mucus production (an indicator of poor treatment control). Overall, one study reported that 72% of men and 86% of women with asthma had symptoms 15 years after an initial diagnosis. Only 19% of these people, however, were still seeing a doctor, and only 32% used any maintenance medication.

Patients who develop occupational asthma often experience asthmatic symptoms for years, even after avoiding the harmful triggers. Improvement does occur over time in most people who leave such jobs.

Emotional Problems. Even when it is not life-threatening, asthma is debilitating and frightening. It significantly lowers the quality of life.

Sleep Disorders. Sleeplessness and daytime sleepiness are common problems. Studies indicate that between 80 - 93% of people with asthma have sleeping problems about three times a week. In one poll, 40% missed work an average of 11 days a year because of sleep disturbance. Asthma has been associated with snoring and obstructive sleep apnea, a condition in which blockage of the upper airway causes the sleeper to temporarily stop breathing, then resume with a gasp, often many times during each hour of sleep.

Asthma and Pregnancy. Uncontrolled asthma in pregnant women puts them at higher risk for complications that can include early labor, hypertension, gestational diabetes, and hemorrhage. Asthma also places the babies at risk for lower birth weight and breathing disorders. Teenage mothers with asthma face higher risks than older women. Fortunately, studies indicate that most asthma drugs are safe to take during pregnancy, and good control of asthma reduces these risks to normal levels.

New guidelines released in 2005 by the National Asthma Education and Prevention Program (NAEPP) emphasize that most asthma medications are safe for pregnant women. The guidelines recommend that pregnant women with asthma have albuterol available at all times. Inhaled corticosteroids should be used for persistent asthma. Patients whose persistent asthma does not respond to standard dosages of inhaled corticosteroids may require a higher dosage or the addition of a long-acting beta agonist to their drug regimen. For severe asthma, oral corticosteroids may be required. The NAEPP notes that while it is not clear if oral corticosteroids are safe for pregnant women, uncontrolled asthma poses an even greater risk for a woman and her fetus.

Heart Disease. There have been some reports of an association between asthma and a heightened risk for heart disease. Some experts believe that the inflammatory process may be the common factor linking the two conditions, although there is no evidence to date confirming any causal association.

Risk Factors

According to a major national 2001 survey, American adults have a 10% lifetime risk for developing asthma. As of 2002, an estimated 20 million adults had the disorder. Between 1980 - 1996 the prevalence of asthma increased by nearly 74%, but it may be stabilizing. Other respiratory diseases, sinusitis, and ear infections are also on the rise, suggesting that airborne or environmental factors may be at work that affects all of these conditions, including asthma.

Before puberty, asthma occurs more often in males, but after adolescence, it appears to be more common in females. In adults with similar cases of actual airway obstruction, women are likely to report more severe symptoms than men are. In addition, women may be at much greater risk of death from asthma than men.

In both adults and children, the incidence of obesity and asthma has been increasing in parallel over recent years. Studies report a strong association between the two conditions. Some experts suggest that excess weight pressing on the lungs may trigger the hyperreactive response in the airways typical of asthma. Others believe that asthma leads to obesity by inhibiting physical activity, although several studies have found no difference in activity levels between people with or without asthma. Some studies suggest that many obese people may be misdiagnosed as having asthma when in fact they are simply short of breath, possibly because of the increased effort required for breathing.

In one study of elderly people with severe adult-onset asthma, smoking was the most significant risk factor for developing this condition. Smoking, in any case, contributes to decline in lung function in everyone.

Urban Life and Poverty. African Americans have higher rates of asthma than Caucasians or other ethnic groups. They are also more likely to die of the disease. Ethnicity and genetics, however, are less likely to play a role in these differences than socioeconomic differences, such as having less access to optimal health care. Poverty is a consistent risk factor in most studies. Both the elderly and the urban poor have the highest risk for severe asthma and death. Urban life, in fact, has been associated with a higher risk for asthma in all income groups and among both children and adults. Twin studies also suggest that people who have lower educational levels (as well as those who exercise less) are at higher risk for adult-onset asthma, further suggesting a link to lower economic status.

Geographical Differences. Asthma rates vary widely among different populations regardless of socioeconomic or other factors. For example, asthma and hospitalization rates are dramatically higher in New York Puerto Ricans than in Hispanic Americans who live in Los Angeles or the Southwest. Among the U.S. states, rates are lowest in Louisiana and highest in Maine.

There are significant differences among nations. In a 2001 study of 22 nations, the countries with the highest asthma rates were Britain, Ireland, Australia, New Zealand, and the U.S. (According to another study, asthma rates are also significantly higher in Canadian adults than they are in comparable European groups.) Low rates were reported in Iceland, Norway, Spain, Germany, Italy, Algeria, India, and Eastern European nations. The reasons for these variations are still unknown.

Diagnosis

When asthma is suspected, the patient should describe for the doctor any pattern related to the symptoms and possible precipitating factors, including:

Whether symptoms are more frequent during the spring or fall (allergy seasons).
Whether exercise, a respiratory infection, or exposure to cold air has ever triggered an attack.
Any family history of asthma or allergic disorders, such as eczema, hives, or hay fever.
Any occupational or long-term exposure to chemicals. Early detection of occupational asthma is very important. If symptoms improve on weekends and vacation and are worse at work, the job is likely to be the source of the asthma, although this is not always the case. Asthma is common, and exacerbation at work may be coincidental.

A number of disorders may cause some or all of the symptoms of asthma:

Asthma and chronic obstructive lung diseases (chronic bronchitis and emphysema) affect the lungs in similar ways and, in fact, may all be present in the same person. Unlike other chronic lung conditions, asthma usually first appears in patients younger than age 30 and with chest x-rays that are normal. Still, it may be difficult to distinguish these disorders in some adults with late onset asthma.
Panic disorder can coincide with asthma or be confused with it.
Gastroesophageal reflux disorder (GERD) is a common companion in asthma and may affect treatment.
Other diseases that must be considered during diagnosis are pneumonia, bronchitis, severe allergic reactions, pulmonary embolism, cancer, heart failure, tumors, psychosomatic illnesses, and certain rare disorders (such as tapeworm and trichomoniasis).

If symptoms and a patient's history suggest asthma, the doctor will usually perform tests known as pulmonary function tests to confirm the diagnosis and determine the severity of the disease.

Using a spirometer, an instrument that measures the air taken into and exhaled from the lungs, the doctor will determine several values:

1. Vital capacity (VC), which is the maximum volume of air that can be inhaled or exhaled.

2. Peak expiratory flow rate (PEFR), commonly called the peak flow rate, which is the maximum flow rate that can be generated during a forced exhalation.

3. Forced expiratory volume (FEV1), which is the maximum volume of air expired in one second.

Spirometry is a painless study of air volume and flow rate within the lungs. Spirometry is frequently used to evaluate lung function in people with obstructive or restrictive lung diseases such as asthma or cystic fibrosis.

If the airways are obstructed, these measurements will fall. Depending on the results, the doctor will take the following steps:

If measurements fall, the doctor typically asks the patient to inhale a bronchodilator. This drug is used in asthma to open the air passages. The measurements are taken again. If the measurements are more normal, the drug likely has cleared the airways and a diagnosis of asthma is strongly suspected.
If measurement results fail to show airway obstruction, but asthma is still suspected, the doctor may perform a challenge test. This involves administering a specific drug (histamine or methacholine) that usually increases airway resistance only when asthma is present. The challenge test may be quite useful in ruling out occupational asthma. It is not always accurate, particularly in patients whose only symptom is persistent coughing.
Administering cold air is another method for inducing airway resistance. This test is very accurate for ruling out asthma, but it is not sensitive enough to accurately identify adults who actually have asthma.

The patient may be given skin or blood allergy tests, particularly if a specific allergen is suspected and available for testing. Allergy skin tests may be the best predictive tests for allergic asthma, although they are not recommended for people with year-round asthma.

Click the icon to see an image of allergy testing.

Tests that either rule out other diseases or obtain more information about the causes of asthma include:

A complete blood count.
Chest and sinus x-rays.
Computed tomography (CT) scans. CT scans may be helpful in certain cases, such as for determining wall thickness in airways in patients who are difficult to treat, which could signify a higher risk for lung damage.
Examination of the patient's sputum for eosinophils (white blood cells that in high levels are associated with severe allergic asthma). One 2002 study suggested that treatment goals based on achieving a normal eosinophil count might effectively manage asthma.
Researchers are investigating measurements of certain chemicals in sputum or exhaled air that indicate airway inflammation. Such chemical markers include nitric oxide and hydrogen peroxide. For example, high levels of nitric oxide in exhaled air is proving to be a simple and noninvasive way of diagnosing asthma.
If aspirin-induced asthma (AIA) is suspected, a non-invasive test called acoustic rhinometry may be useful. A solution of lysine acetylsalicylic acid (L-ASA) is instilled into the patient's nostril. Patients who experience symptoms such as sneezing, itching, congestion, and secretion are likely to have AIA.

Treatment

Beta2-agonists are the standard therapy. They may be administered with a nebulizer (a device that administers the drug in a fine spray) or given hourly with an inhaler. Studies are suggesting the use of an inhaler is equally or possibly more effective than a nebulizer. Intravenous delivery is not recommended in most cases.
A corticosteroid (commonly called a steroid) given within the first hour helps reduce the need for hospitalization. Steroids are typically administered intravenously or as an injection in adults. Lower doses work as well as higher ones in these situations.
Intravenous magnesium opens airways and is an important emergency treatment for patients with very severe asthma.
Oxygen is usually administered, and can be life-saving in severe cases.
In life-threatening situations, the patient may require mechanical ventilation.
Antibiotics are not useful for asthma attacks if there is no strong evidence of the presence of a bacterial infection. (Viral infections, most often colds and the flu, are more likely to trigger an asthma attack. In such cases, antibiotics do not appear to be beneficial and may have adverse effects.)

Discharge and Relapse After Hospitalization. It typically takes 3 - 4 hours to determine if a patient can be safely sent home or if they need to stay in the hospital. Patients are generally discharged under the following circumstances:

When symptoms are gone or are minimal, and
The peak expiratory flow rate is 70% or more of the predicted rate

Discharged patients generally take oral corticosteroids for 5 - 7 days. Despite reasonable precautions, about 20% of patients relapse within 2 weeks, although the risk is very low if they keep taking their medication after they leave.

Avoiding allergens, following appropriate drug treatments, and home monitoring are key elements in preventing dangerous asthma attacks and hospitalization. A combination of medications is important for both treating and preventing asthma attacks. In addition, good communication between the doctor and patient is a key factor in a successful management program. Written action plans, which instruct individual patients how to properly respond to changes in their unique symptoms, are a very important element in successful self-management of asthma.

Medications for asthma fall into two categories:

Rescue Medication. Medications that open the airways (bronchodilators, or inhalers) are used to quickly relieve any moderate or severe asthma attack. These drugs are usually short-acting beta-adrenergic agonists (beta2-agonists). Other drugs used in special cases include corticosteroids taken by mouth and anticholinergic drugs. None of these drugs have any effect on the disease process itself. They are only useful for treating symptoms.
Maintenance Medication. Simply coping with asthma symptoms without also controlling the damaging inflammatory response is a common and serious error. For adults and children over age 5 with moderate-to-severe persistent asthma, experts now recommend inhaled corticosteroids and long-acting beta2-agonists.

Patients can greatly reduce the frequency and severity of asthma attacks by understanding the difference between coping with asthma attacks and controlling the disease over time. Unfortunately, many patients do not understand the difference between medications that provide rapid short-term relief and those that are used for long-term symptom control. Many patients with moderate or severe asthma overuse their short-term medications and underuse their corticosteroid medications. The overuse of bronchodilators can have serious consequences; not using steroids can lead to permanent lung damage.

Patients need to understand that asthma symptoms can change quickly over time and that treatment strategies may need to change. In 2005, the two leading U.S. allergy associations published joint guidelines on controlling asthma. The guidelines emphasize that asthma treatment decisions need to be made on an individual basis. It is important that patients have a close relationship with their doctor. The doctor needs to evaluate a patient’s asthma symptoms at each and every visit to determine if there should be any changes in medication.

According to the guidelines, asthma management is classified as either “well-controlled” or “not well-controlled.” Your doctor may need to change some of your medications, or increase or decrease the dosage, depending on whether your asthma is well-controlled or not well-controlled.

These are the signs of well-controlled asthma:

Asthma symptoms occur twice a week or less
Rescue bronchodilator medication is used twice a week or less
Symptoms do not cause nighttime or early morning awakening
Symptoms do not limit work, school, or exercise activities
Peak flow meter readings are normal or the patient’s personal best
Both the doctor and the patient consider the asthma to be well controlled

Most asthma drugs are inhaled using various forms of inhalers or nebulizers. Inhaled drugs must be used regularly as prescribed and the patient carefully trained in their use in order for them to be effective and safe. The basic devices are the metered-dose inhaler (MDI), breath-actuated inhalers, dry powder inhalers, and nebulizers.

MDIs have used chlorofluorocarbons (CFCs) as their propellants. CFCs are damaging to the environment. CFCs are now being replaced with other propellants (such as hydrofluoroalkane) that are equally effective to CFCs, are environmentally safe, and do not chill the device as CFCs do. Devices that don't use propellants at all are also now available.

Metered-Dose Inhaler. The standard device for administering any asthma medication has been the metered-dose inhaler (MDI). This device, particularly when used with a holding chamber, allows precise doses to be delivered directly to the lungs.

Click the icon to see an image of a holding chamber.

MDI-delivered drugs must be used regularly as prescribed, and the patient carefully trained in their use, for the drugs to be effective and safe. Some patients hold the MDI too close to their mouths, or even inside them. Others may exhale too forcefully before inhalation. The holding chamber, or spacer, allows the patient additional time to inhale the medication, improving delivery. They vary, however, in their ability to deliver medication. Often MDIs continue to deliver propellant after the drug has been used up. Patients should track their medicine and throw the device away when the last dose has been administered.

Click the icon to see an illustrated series detailing metered dose inhaler use.

Dry Powder Inhalers. Dry powder inhalers (DPIs) deliver a powdered form of beta2 agonists or corticosteroids directly into the lungs. They also do not use CFCs. Such devices include Rotahaler, Spinhaler, Turbohaler, Clickhaler, Easyhaler, Diskhaler, Discus, Twisthaler, Spiros, and others. DPIs are as effective as the older devices, and generally have a better taste and are easier to manage. They may differ among themselves, however, in their ability to deliver drugs into the airways. In one study, for example, the Turbohaler was easier to use than the Diskhaler, achieving better delivery. The Discus is another effective DPI. It has a dose counter and protects against exhalation effects.

Humidity or extreme temperatures can affect these inhalers' performance, so they should not be stored in humid places (bathroom cabinets) or locations subject to high temperatures (glove compartments during summer months).

Dry-powder may cause tooth erosion, and children are advised to rinse their mouths out right after using a DPI and to brush twice a day with a fluoride toothpaste.

Other Hand-Held Inhalers. Respimat delivers a fine-mist spray that is created by forcing the liquid medication through nozzles. It does not use any propellant.

Nebulizers. A nebulizer is a device that administers the drug in a fine spray that the patient breathes in. They are mostly used in hospital settings or when the patient cannot use an inhaler. Nebulizers may be important for delivering newer drugs used in asthma treatment.

Click the icon to see an illustrated series detailing nebulizer use.

People who self-manage their asthma using daily monitoring of peak air flow and adjusting their medications as needed have fewer hospitalizations, fewer unplanned doctors visits, and, generally, a better quality of life than those who rely only on the occasional doctor or emergency room visit to control symptoms. Doctors recommend that patients with even mild asthma monitor their own conditions.

In general, monitoring involves the following steps:

A peak flow meter is the standard monitoring device for measuring peak expiratory flow rate (PEFR).

Click the icon to see an image of a peak flow meter.

Patients with severe asthma should take PEFR readings two or three times a day. The overall goal should be to achieve less than a 20% (and ideally only 10%) variation in readings between evening and morning rates. For mild-to-moderate asthma, a single determination each morning usually suffices, but patients should check with their doctors.
It is important to use the meter at the same times each day and to stand or sit in the same position to keep an accurate record.
Patients should keep an ongoing record of their peak flow readings to help them detect worsening of their condition.
They should also record attacks, exposure to any allergens or triggers, and medications taken.
After about 2 months, patients and doctors can use the recorded data for administering medications effectively and to recognize problems before they become serious.

In general, many people fail to monitor their asthma. Experts believe that, ideally, portable monitors should be available to measure forced expiratory volume (FEV1), a more accurate gauge of lung function, and the results should be electronically transmitted to the doctor.

New monitoring devices are showing promise in accomplishing one or more of these goals, although they are not covered by most insurers. For example, the AirWatch is a handheld digital monitor that measures and displays the rate of airflow and compares it to the rates from previous days. Once a month, or whenever there is a problem, the patient plugs the device into a standard telephone jack, and the daily readings are sent to an automated data center that creates tables and charts for the patient and the doctor.


Medication Purpose	Drug Class	Generic Name	Brand Names	Administration
Quick-Relief Medications (control acute attacks)	Short-Acting Beta2 Agonists	Albuterol	Proventil, Ventolin, AccuNeb	Inhaler, nebulizer
		Levalbuterol	Xopenex	Nebulizer
		Metaproterenol	Alupent	Inhaler
		Pirbuterol	MaxAir	Inhaler
		Ipratropium / Albuterol	Combivent	Inhaler
	Anticholinergics	Ipratropium	Atrovent	Inhaler
		Tiotropium	Spiriva	Inhaler
	Systemic Corticosteroids	Cortisone	Cortone	Pill
		Dexamethasone	Decadron	Pill
		Hydrocortisone	Cortef	Pill
		Methylprednisolone	Medrol	Pill
		Prednisolone	Orapred, Prelone	Syrup
		Prednisone	Various	Pill
		Triamcinolone	Aristocort	Pill
Long-Term Relief Medications (prevent attacks and control chronic symptoms)	Inhaled Corticosteroids	Beclomethasone	QVAR	Inhaler
		Budesonide	Pulmicort	Inhaler, nebulizer
		Budesonide / Formoterol	Symbicort	Inhaler
		Flunisolide	AeroBid	Inhaler
		Fluticasone	Flovent	Inhaler
		Fluticasone / Salmeterol	Advair	Inhaler
		Mometasone	Asmanex	Inhaler
		Triamcinolone	Azmacort	Inhaler
	Long-Acting Beta2-Agonists	Formoterol	Foradil	Inhaler
		Salmeterol	Serevent	Inhaler
	Anti-inflammatories	Cromolyn	Intal	Nebulizer
		Nedocromil	Tilade	Inhaler
	IgE-inhibitor	Omalizumab	Xolair	Injectable
	Leukotriene Modifiers	Montelukast	Singulair	Pill
		Zafirlukast	Accolate	Pill
		Zileuton	Zyflo	Pill
	Methylxanthine	Theophylline	Uniphyl, Quibron, Theo-24	Pill, syrup

Quick-Relief Medications

These medications quickly control acute asthma attacks.

Beta2-agonists do not reduce inflammation or airway responsiveness but serve as bronchodilators, relaxing and opening constricted airways during an acute asthma attack. They are used alone only for patients with mild and intermittent asthma. Patients with more severe cases should use them in combination with other drugs.

Specific short-acting beta2-agonists include:

Albuterol (Proventil, Ventolin), called salbutamol outside the U.S., is the standard short-acting beta2-agonist in America. Other similar beta2-agonists are isoproterenol (Isuprel, Norisodrine, Medihaler-Iso), metaproterenol (Alupent, Metaprel), pirbuterol (Maxair), terbutaline (Brethine, Brethaire, Bricanyl), and bitolterol (Tornalate). Isoetharine (Bronkometer, Bronkosol) is available in nebulizers.
Newer beta2-agonists, including levalbuterol (Xopenex), have more specific actions than the standard drugs. Studies have indicated that levalbuterol is as effective as albuterol with fewer side effects. The original formulation of Xopenex was administered with a nebulizer. A new metered-dose inhaler formulation became available in late 2005.

Short-acting bronchodilators are generally administered through inhalation and are effective for 3 - 6 hours. They relieve the symptoms of acute attacks, but they do not control the underlying inflammation. If asthma continues to worsen with the use of these drugs, patients should discuss corticosteroids or other drugs to treat underlying inflammation.

Side Effects of Beta2-Agonists. Side effects of all beta2-agonists include the following:

Anxiety
Tremor
Restlessness
Headache
Fast and irregular heartbeats. A doctor should be notified immediately if this side effect occurs, particularly in people with existing heart conditions. Such patients face an increased risk for sudden death from cardiac related causes. This risk is higher with oral or nebulized drugs, but there have also been reports of heart attacks and angina in some patients using inhaled beta2-agonists.

Beta2-agonists have serious interactions with certain other drugs, such as beta-blockers, and patients should tell the doctor about any other medications they are taking. Individuals with diabetes, existing heart disease, high blood pressure, hyperthyroidism, an enlarged prostate, or a history of seizures should take these drugs with caution.

Loss of Effectiveness and Overdose. There has been some concern that short-acting beta2-agonists become less effective when taken regularly over time, increasing the risk for overuse. Over time some patients may become tolerant to many effects of short-acting beta2-agonists. The degree to which this affects the airways is uncertain. In some studies, the duration of action has declined but the peak effect appears to be preserved, making these drugs still useful for acute attacks. Regular use of long-acting beta 2-agonists may reduce the effect of short-acting forms.

Patients who perceive beta2-agonists as being less effective may overuse them. Overdose can be serious and in rare cases even life-threatening, particularly in patients with heart disease.

Inhaled ipratropium bromide (Atrovent) acts as a bronchodilator over time. Ipratropium bromide alone is only modestly beneficial for acute asthma attacks. Moreover, the drug is not approved specifically for asthma. It may, however, have benefits in certain cases:

It may be useful for certain older patients with asthma who also have emphysema or chronic bronchitis.
A combination with a beta2-agonist might be helpful for patients who do not initially respond to treatment with a beta2-agonist alone.

Common oral corticosteroids include prednisone, prednisolone, methylprednisolone, and hydrocortisone. They very effectively reduce inflammation but are generally used only after hospitalization for an acute attack. In some severe cases, they may be used as maintenance.

Adverse effects of prolonged use of oral steroids include cataracts, glaucoma, osteoporosis, diabetes, fluid retention, susceptibility to infections, weight gain, hypertension, capillary fragility, acne, excess hair growth, wasting of the muscles, menstrual irregularities, irritability, insomnia, and psychosis. Osteoporosis is a common and particularly severe long-term side effect of prolonged steroid use. Medications that can prevent osteoporosis include calcium supplements, parathyroid hormone, bisphosphonates, or hormone replacement therapy in post-menopausal women.

Osteoporosis is a condition characterized by progressive loss of bone density, thinning of bone tissue, and increased vulnerability to fractures. Osteoporosis may result from disease, dietary or hormonal deficiency or advanced age. Regular exercise and vitamin and mineral supplements can reduce and even reverse loss of bone density.

Long-term use of oral steroid medications suppresses secretion of natural steroid hormones by the adrenal glands. After withdrawal from these drugs, this so-called adrenal suppression persists, and it can take the body a while (sometimes up to a year) to regain its ability to produce natural steroids again. There have been a few cases of severe adrenal insufficiency that occurred when switching from oral to inhaled steroids, which, in rare cases, has resulted in death.

No one should stop taking any steroids without consulting a doctor first. If the doctor orders steroids withdrawn, regular follow-up monitoring is necessary. Patients should discuss with their doctor measures for preventing adrenal insufficiency during withdrawal, particularly during stressful times when the risk increases.

Long-Term Relief Medications

These medications are taken on a regular basis to prevent asthma attacks and control chronic symptoms.

Inhalation of corticosteroids makes it possible to provide effective local anti-inflammatory activity in the lungs with minimal systemic effects. (By contrast, steroids taken by mouth have considerable side effects throughout the body.) Inhaled corticosteroids are recommended as the primary therapy under the following circumstances:

For any asthmatic condition more serious than occasional episodes of mild asthma. (Low-doses of inhaled steroids may even be safe and effective for some people with mild asthma, particularly those who find themselves using beta2-agonists daily.)
When treatment with bronchodilators is not effective.

Examples of inhaled corticosteroids:

The most recent generation of inhaled steroids include fluticasone (Flovent), budesonide (Pulmicort), triamcinolone (Azmacort and others), and flunisolide (AeroBid). In general, these newer steroids are more powerful than the older generation of inhaled drugs. These steroids are sometimes combined with a long-acting beta2-agonist in a single inhaler.
The FDA approved a new inhaled corticosteroid, mometasone furoate (Asmanex) in 2005.
The older corticosteroid inhalants are beclomethasone (Beclovent, Vanceril) and dexamethasone (Decadron Phosphate Respihaler and others). They are less powerful than the newer steroids when delivered with standard inhalers. New inhaler systems include QVAR, which uses extra fine formulations of beclomethasone to allow deep delivery into the lungs. Such systems may prove to be as effective as the newer, more potent steroids. Beclomethasone is believed to be safe during pregnancy.
Inhalers that combine both long-acting beta2-agonists and corticosteroids are also available. These include Symbicort (budesonide/formoterol), which in 2006 was approved for patients ages 12 years and older.

Traditionally, patients have been advised to take corticosteroids on a daily basis. However, a 2005 study suggested that intermittent corticosteroid therapy may be appropriate for some patients with mild persistent asthma. In the Improving Asthma Control Trial (IMPACT), researchers found that patients with mild persistent asthma who used an inhaled corticosteroid (budesonide) on an as-needed basis to control acute symptoms had similar lung function and quality of life outcomes as patients who used the drug daily. The researchers emphasize that patients with severe asthma should adhere to a daily dosage schedule, and that all patients with asthma should consult with their doctor to discuss any changes in medication regimen.

Optimal timing of the dose is important and may vary depending on the medication. Most of the newer inhaled steroids and even some older ones are now available as a single daily dose.

Inhaled steroids are generally considered safe and effective and only rarely cause any of the more serious side effects reported with prolonged use of oral steroids. Side effects of inhaled steroids are the following:

The most common side effects are throat irritation, hoarseness, and dry mouth. These effects can be minimized or prevented by using a spacer device and rinsing the mouth after each treatment.
Rashes, wheezing, facial swelling (edema), fungal infections (thrush) in the mouth and throat, and bruising are also possible but not common with inhalators.
A 2001 study reported a higher risk for cataracts in patients over age 40. (No higher risk was observed in younger people.)
Some studies report a higher risk for bone loss in patients who take inhaled steroids regularly, a side effect which is known to occur with oral steroids. A number of bone-preserving medications are now available that might safely offset this effect.
There is some concern that the more potent drugs, particularly fluticasone, suppress the adrenal system (which secretes natural steroids) to a greater degree than other steroid inhalants. (This is a serious side effect of oral steroids.)

Long-acting beta2-agonists are used in combination with inhaled corticosteroids for treating patients with moderate-to-severe asthma. These drugs include salmeterol (Serevent Diskus) and formoterol (Foradil Aerolizer). Combination single inhalers are available. One combines salmeterol and the corticosteroid fluticasone (Advair Diskus), and another combines formoterol and the corticosteroid budesonide (Symbicort).

Long-acting beta2-agonists are used for preventing an asthma attack (not for treating attack symptoms). The effects of one dose of a long-acting beta2-agonist last for about 12 hours, so these medicines are particularly effective during the night. These drugs also may be used for prevention of exercise-induced asthma in people and to protect against aspirin-induced asthma.

However, research indicates that long-acting beta2-agonists can worsen asthma by increasing symptom severity. These drugs may also increase the risk for asthma-related deaths. Experts are still trying to determine when long-acting beta2-agonists should be added to an asthma treatment plan. If your symptoms do not improve or if symptoms worsen with this type of drug, your doctor will recommend discontinuing it. Do not, however, stop taking this drug or other asthma medications without first talking with your doctor.

Side Effects. Side effects of long-acting beta2-agonists are similar to the short-acting drugs.

Specific Warning on Salmeterol and Formoterol. In 2003, a "black box" warning was added to product packaging for drugs that contain salmeterol, including Serevent Diskus, and Advair Diskus. The warning was based on a study that demonstrated more serious and even fatal asthma episodes in patients who used the drug than in patients who used a placebo. The risk for serious asthma episodes with salmeterol appears to be highest in African Americans and elderly patients with severe asthma.

In 2006, the FDA updated the warning to include formoterol (Foradil Aerolizer). Warnings for salmeterol and formoterol products emphasize that these medicines can increase the risk of severe asthma episodes. If these episodes occur, they can be fatal. Long-acting beta2-agonists require up to 20 minutes to achieve effectiveness, and there is a danger of overdose if a patient is not aware of this delay and takes additional doses to achieve faster relief. The FDA recommends that patients:

Use long-acting beta2-agonists only if other medicines (such as steroids) have not helped control asthma.
Use a short-acting bronchodilator, not a long-acting beta2-agonist, to treat sudden wheezing.
Do not use long-acting beta2-agonists to treat wheezing that is getting worse. Call your doctor if this situation occurs.
Do not stop using any asthma medicines without first talking to your doctor.

Cromolyn sodium (Intal) is both an anti-inflammatory drug and has antihistamine properties that block asthma triggers such as allergens, cold, or exercise. Nedocromil (Tilade) is similar to cromolyn. A cromolyn nasal spray called NasalCrom has been approved for over-the-counter purchase, but only to relieve nasal congestion caused by allergies. Patients should not use it for self-medication without the advice of a doctor.

Candidates. Cromolyn is often used in children with allergic asthma, but it has also been an important treatment for exercise-induced asthma (EIA) in all age groups, for pregnant women, and possibly for preventing allergic asthma in adults as well as children. Both cromolyn and nedocromil appear to be useful for patients with aspirin-induced asthma. These drugs do not effectively treat asthma once an attack is underway. They also have very little long-term benefits on lung function compared to inhaled corticosteroids.

Leukotriene-antagonists include zafirlukast (Accolate), montelukast (Singulair), zileuton (Ziflo), and pranlukast (Ultair, Onon). These drugs are proving to be effective for long-term prevention of asthma, including exercise-induced asthma and aspirin (or NSAID)-induced asthma. Most studies to date still report better success with inhaled corticosteroids than with the leukotriene-antagonists. Their anti-inflammatory actions are different from those of steroids, however, and combinations of the two drugs are being tried. A 2002 analysis of 13 studies, however, reported only modest benefits when anti-leukotrienes were added to corticosteroids. The combination did improve asthma control in some of the studies, but they did not reduce corticosteroid use. (In all but one of these studies the subjects were adults.)

Of some concern are reports of Churg-Strauss syndrome in a few people taking zafirlukast or montelukast. Churg-Strauss syndrome is very rare, but it causes blood vessel inflammation in the lungs and can be life threatening. Oral steroids quickly resolve the problem. Usually the syndrome has occurred in patients who were tapering off steroids and changing over to the leukotrienes-antagonists. Some experts believe that, in such cases, the steroids may simply have masked the presence of the disorder, which then developed when the steroid drugs were withdrawn. Symptoms include severe sinusitis, flu-like symptoms, rash, and numbness in the hands and feet.

Theophylline. Theophylline (Theo-Dur, Theolair, Slo-Phyllin, Slo-bid, Constant-T, Respbid) relaxes the muscles around the bronchioles and also stimulates breathing. One study reported that it may also have anti-inflammatory qualities even in low doses. Available in tablet, liquid, and injectable forms, some theophylline sustained-release tablets and capsules have a long duration of action and can, therefore, be taken once or twice a day with good results.

If theophylline is not taken exactly as prescribed, an overdose can easily occur. Toxicity can cause nausea, vomiting, headache, insomnia, and, in rare cases, disturbances in heart rhythm and convulsions. Contact a doctor immediately if any of these side effects occur.

The risks for these adverse effects are small if the drug is taken exactly as prescribed, but the following precautions should be noted:

Chronic smokers metabolize theophylline much more quickly and require higher doses of the drug than nonsmokers; prolonged-release versions are helpful for such people.
Too much caffeine can increase the concentration of this drug and the amount of time it stays in the body.
Theophylline also interacts with many other drugs that are taken for other common medical conditions, including asthma. Exercise caution when using beta2-agonists and theophylline together.
No one with a peptic ulcer should take theophylline. The elderly and anyone with heart disease, liver disease, hypertension, seizure disorders, or heart failure, should take theophylline with caution. Of special note, people with heart conditions who take theophylline orally face an increased risk for sudden death from heart-related causes.

However, about 1 in 1,000 patients who take omalizumab develop anaphylaxis (a life-threatening allergic reaction). In 2007 the FDA requested the manufacturers of omalizumab put a “boxed warning” on the medicine’s label emphasizing the drug’s risk for anaphylaxis. The boxed warning notes that patients can develop anaphylaxis after any dose of omalizumab, even if they had no reaction to a first dose. Anaphylaxis may occur up to 24 hours after the dose is given.

The FDA recommends that health care providers observe patients for at least 2 hours after an injection. Patients should also carry emergency self-treatment for anaphylaxis (such as an Epi-Pen) and know how to administer it. With an Epi-Pen, or similar auto-injector device, patients can quickly give themselves a life-saving dose of epinephrine.

Anaphylaxis symptoms include:

Difficulty breathing
Chest tightness
Dizziness
Fainting
Itching and hives
Swelling of the mouth and throat

Other Treatments

Various drugs are being investigated for asthma treatment. Some of these drugs have anti-inflammatory effects, which may help reduce dependence on corticosteroids. For example, etanercept (Enbrel), which blocks the inflammatory protein called tumor necrosis factor alpha, is being investigated for patients whose asthma has not responded to other drugs. The humanized monoclonal antibody daclizumab has also improved asthma control in patients with treatment-resistant asthma, as well as patients with moderate to severe chronic persistent asthma. Certain antibiotics, such as clarithromycin (Biaxin), may improve lung function in patients with asthma who show evidence of infection with the bacterial organisms Mycoplasma or Chlamydiapneumoniae. Dapsone, a drug known as a sulfone, is also under investigation.

Alternative therapies are being widely used by children, adolescents, and adults with asthma. In one study, nearly half of asthma or allergy sufferers resorted to alternative treatments. To date, however, evidence does not support any value from most alternative therapies, including high-dose vitamins, urine injections, homeopathic remedies, and most herbal remedies.

Relaxation and Stress-Reduction Techniques. Patients report benefits from many stress reduction techniques, such as acupuncture, hypnosis, breathing relaxation techniques, massage therapy, and meditation practices.

Acupuncture, hypnosis and biofeedback are all alternative ways to control pain. Acupuncture involves the insertion of tiny sterile needles, slightly thicker than a human hair, at specific points on the body.

The Buteyko Breathing Method. The Buteyko breathing method is an experimental approach designed to increase levels of carbon dioxide in the body. To do this, patients are trained to reduce their volume of breath and to avoid hyperventilation (over-breathing). Some studies have reported that patients using this method reduce their use of medications and improve their quality of life. The system originated in Australia and is not yet widely available in the U.S.

Probiotics. Probiotics are beneficial bacteria that may help protect against allergies and asthma. Antibiotic over-use and modern hygiene may specifically be reducing these helpful organisms. Probiotics can be obtained in active yogurt cultures and in supplements, which are being studied for protection.

Herbal Remedies. There have been few rigorous studies on herbal remedies for asthma. Butterbur (also known as Petasites hybridus, butter dock, blatterdock, bog rhubarb, and exwort) is one traditional herbal remedy used for treating seasonal allergies and asthma. In a 2002 study, it appeared as effective and less sedating than a commonly prescribed antihistamine for treating seasonal allergies over a 2-week period, but there has been little research on its effect on asthma.

Manufacturers of herbal remedies and dietary supplements do not need FDA approval to sell their products. Just like a drug, herbs and supplements can affect the body's chemistry, and therefore have the potential to produce side effects that may be harmful. There have been a number of reported cases of serious and even lethal side effects from herbal products. Always check with your doctor before using any herbal remedies or dietary supplements.

Managing Asthma

Avoidance or control of the triggers that lead to asthma attacks is as much a priority as treatment of the disease.

Controlling Pets. Patients who already have pets and are not allergic to them probably have a low risk for developing allergies. If pets trigger asthma, however, they should be kept outside. If this isn't possible, they should at least be confined to carpet-free areas outside the bedroom. Cats harbor significant allergens, which can even be carried on clothing; dogs usually present fewer problems. Washing animals once a week can reduce allergens. Dry shampoos, such as Allerpet, are now available for both cats and dogs that remove allergens from skin and fur and are easier to administer than wet shampoos.

Controlling for Dust. Spray furniture polish is very effective for reducing both dust and allergens. Air cleaners, filters for air conditioners, and vacuum cleaners with High Efficiency Particle Arresting (HEPA) filters can help remove particles and small allergens found indoors. Neither vacuuming nor the use of anti-mite carpet shampoo, however, is effective in removing mites in house dust. In fact, vacuuming stirs up both mites and cat allergens. If possible, avoid carpets and rugs.

A HEPA (High Efficiency Particle Arresting) filter can remove the majority of harmful particles, including mold spores, dust, dust mites, pet dander and other irritating allergens from the air. Along with other methods to reduce allergens, such as frequent dusting, the use of a HEPA filtration system can be a helpful aid in controlling the amount of allergens circulating in the air. HEPA filters can be found in most air purifiers, which are usually small and portable.

Bedding and Curtains. Many experts recommend reducing exposure to dust mites by enclosing mattresses and pillows in semipermeable coverings. (Vinyl mattress covers limit airflow and may also worsen, or even cause, asthma in children. Synthetic pillows may pose a significantly higher risk for severe asthma attacks in children than feather or no pillows.) However, several 2005 studies suggested that such covers do not prevent asthma or allergies. Replace curtains with shades or blinds, and wash bedding using the highest temperature setting.

Reducing Humidity in the House. Although warm, moist air from vaporizers can greatly ease and moderate asthma attacks, living in a damp house is counterproductive. Dust mites thrive in humidity and damp houses increase the risk for mold, so on-going humidifiers can be unuseful. If they are used, humidity levels should not exceed 40% and they should be cleaned daily with a vinegar solution.

Gas Stoves, Kerosene, and Cooking. People with asthma should choose electric ovens rather than gas, which release nitrogen dioxide, a substance that can aggravate asthma symptoms. Even smoky cooking can worsen asthma. Kerosene (used in space heaters and lamps) may also produce allergic reactions.

Exterminating Pests (Cockroaches and Mice). Use a professional exterminator to eliminate cockroaches. (One study reported that ridding a home of cockroaches and cleaning the house using standard housecleaning techniques failed to eliminate the cockroach allergens themselves.) Exterminate mice and attempt to remove all dust, which might contain mouse urine and dander.

Avoiding Smoking and Cigarette Smoke. Cigarette smoke can accelerate the decline in lung function related to asthma. Even exposure to secondhand smoke can double the risk of asthma-related emergency room visits. In one study, it was the most frequently cited trigger of asthma symptoms. Everyone should quit smoking and encourage others around them to quit. [For help in quitting, see In-Depth Report # 41: Smoking.]

Click the icon to see an image of common asthma triggers.

Avoiding Outdoor Allergens. The following are some recommendations for avoiding allergens outside:

Avoid scheduling camping and hiking trips during times of high pollen count (generally, May and June for grass pollen and mid-August to October for ragweed).
Avoid strenuous activity when ozone levels are highest, which usually occur in early afternoon, particularly on hot hazy summer days. Levels are lowest in early morning and at dusk.
Asthma attacks are often higher during thunderstorms. It is not clear why. Some evidence points to a build-up of ozone that accompanies such storms. One study suggested that changing airflow patterns bring a sudden downdraft of air containing concentrations of pollens, small particles and allergens.
Patients who are allergic to mold should avoid barns, hay, raking leaves, and mowing grass. Exposure to automobile fumes may worsen asthma. Fungi in car air conditioners can also be a problem.

Click the icon to see an image of fungus.

Reducing Exposure to Air Pollution. A number of studies have linked air pollution to asthma. An important 2000 study found a strong association between higher mortality rates from heart and lung diseases and high levels of specific pollutants (ozone, carbon monoxide, sulfur dioxide, and nitrogen dioxide). Some experts point out that asthma rates in North America have increased over recent years while the prevalence of many common air pollutants have declined. Nevertheless, evidence strongly suggests that air pollution can worsen existing asthma and patients should take precautions if they are exposed to polluted air.

A number of studies have estimated that between 2 - 26% of adult-asthma cases are related to work history. Some experts encourage doctors to suspect occupational factors in all cases of adult-onset asthma. Although workers who have allergies, who smoke, or both are at higher risk than others, any worker exposed to occupational triggers may be at risk for asthma.

Work-related asthma is one of two types:

Work-aggravated asthma, in which existing asthma symptoms are triggered by irritants at the workplace
Occupational asthma, which is new-onset asthma strongly associated with conditions at work

Occupational asthma is further categorized as:

Nonlatent (symptoms occur right after exposure to an irritant, usually high concentrations of gas, fumes, dust, or chemicals)
Latent (symptoms develop after prolonged exposure to substances in the workplace)

Occupational Triggers. Over 250 substances have been identified as potential occupational triggers of asthma, and the list is growing. A few of these chemicals and substances include:

Isocyanates used in the manufacture of polyurethane, paints, steel, and electronics
Trimellitic anhydrides (TMA) used in many plastics and epoxies
Western red cedar, oak, redwood, and mahogany
Metal salts (platinum, nickel, and chrome) and metal working fluids
Vegetable dusts (soybeans, grains, flour, cotton, and gums)
Biologic organisms (Bacillus subtilis, pancreatic enzymes)
Xylanase used in the baking industry
Pharmaceuticals (penicillin, phenylglycine acid chloride)
Glutaraldehyde used to sterilize medical equipment
Red dye made from the cochineal insect
Diacetyl, the main chemical in artificial butter flavoring used in popcorn

Workers in these industries and others, including farmers, hairdressers, and those who work in the garment industries are at risk for asthma.

Preventing Occupational Asthma. In people whose asthma is caused by workplace conditions, improved ventilation or face masks may help.

Sometimes, however, even low levels of chemical substances can trigger an asthma attack. In such cases, leaving the job is the only way to prevent the condition from getting worse. Because such a step can be emotionally and financially threatening, workers should be sure that occupational substances are the cause of the asthma by having a complete check-up by a lung specialist.

If the diagnosis of occupational asthma is certain, patients should obtain advice on available compensation plans for disability. The effects of workplace asthma can be permanent. However, in one study, 70% of people with asthma experienced significant improvement in symptoms after leaving the job.

Immunotherapy ("allergy shots") may help reduce asthma symptoms, and the use of asthma medications, in patients with known allergies. They may also help prevent the development of asthma in children with allergies. Immunotherapy poses some risk for severe allergic reactions, however, especially for children with poorly controlled asthma.

[See In-Depth Report #77: Allergic rhinitis; and Report #5: Asthma in children and adolescents.]

Preventing and Treating Respiratory Infections. Respiratory infections, including the common cold, can act with allergies to worsen asthma. People with asthma should try to minimize their risk for respiratory tract infections. Washing hands is a very simple but effective preventive measure.

Patients with asthma should ask their doctors about the flu vaccine and also whether they should receive the vaccination against pneumococcal pneumonia.

Zanamivir, a new drug used for treating influenza, is considered safe for patients with asthma 12 years of age or older. In one study, patients with asthma who were treated with zanamivir experienced fewer flu symptoms and had improved lung function. [See In-Depth Report #94: Colds and influenza.]

Managing Hormonal-Related Asthma. Women who suspect that menstrual-related changes may influence asthma severity should keep a diary recording their menstrual dates and times of asthma attacks. In some cases, adjusting medications in anticipation of menstruation may help prevent attacks. Some small studies have suggested that hormonal drugs called gonadotropin-releasing hormone (GnRH) analogues may help women with severe premenstrual asthma. Such drugs reduce or suppress estrogen levels, however, and can have severe side effects. More research is needed to determine if the disadvantages outweigh the benefits.

Weight Loss. People who have asthma and who are overweight may help reduce asthma symptoms with weight loss.

Vitamin D. There may be an association between a lack of vitamin D and asthma. Some research suggests that children are less likely to develop asthma at a young age if their mothers consume a high intake of vitamin D during pregnancy. Vitamin D is available from dietary sources or vitamin supplements.

Fish Oil. Omega-3 fatty acids, found in cold water oily fish and in supplements (preferably DHA-EPA, which are the important compounds in fish oil) have anti-inflammatory effects. Some evidence suggests they may be helpful for people with asthma, although it is weak.

Caffeine. Caffeine has properties that are similar to theophylline, a drug used to treat asthma. A major analysis of studies reported that caffeine improved lung function for up to 4 hours after consumption. (People who are going to have their lung function tested should avoid drinking coffee, tea, or other caffeinated beverages for at least 4 hours beforehand.)

Alcohol. In adults, some research suggests that alcohol intake may influence allergy severity. One study found that as little as one drink a day is enough to worsen dust mite allergies.

Role of Food Allergies. Although 67% of people with asthma believe their symptoms are aggravated by food allergies, studies indicate that this belief may be true in only 5% of cases. The primary suspects are monosodium glutamate, or MSG (found in some canned soups, cheese, and certain vegetables), and sulfites (preservatives in wine and foods that include processed frozen potatoes and tuna). Contrary to what many people believe, dairy products do not appear to worsen asthma symptoms in people who are not already allergic to them.

Asthma is no reason to avoid exercise. Historically, about 10% of Olympic athletes have asthma. Some studies indicate that long-term exercise even helps control asthma and reduce hospitalization. Patients should consult their doctors before embarking on any exercise program, however. Uncontrolled asthma can be dangerous and, in rare cases, can be fatal for athletes, even some with mild asthma. Use of the inhaler is extremely important.

People who enjoy running should probably choose an indoor track to avoid pollutants. Swimming is excellent for people with asthma. Yoga practice, which uses both stretching, breathing, and meditation techniques, may have particular benefits. One study reported that two-thirds of patients who practiced yoga regularly were able to reduce or stop taking their asthma medications.

Exercise-induced asthma is a limited condition that has specific recommendations.

People with asthma have no higher rate of anxiety or depression than the general population. However, such emotions interact with the effects of asthma and its treatments in important ways:

Negative emotions can discourage compliance with medication and the ability to cope
Poor control of asthma symptoms, in turn, increases the risk for negative emotions
Stress and depression have been associated with more severe symptoms and even an increased risk of fatal asthma attacks

Some evidence suggests that stress reduction techniques, a positive attitude and relaxation techniques can be very helpful in the long-term management of asthma. [See In-Depth Report #31: Stress.]

Resources

www.lungusa.org -- The American Lung Association
www.acaai.org -- American College of Allergy, Asthma & Immunology
www.aaaai.org -- American Academy of Allergy, Asthma & Immunology
www.nhlbi.nih.gov -- National Heart, Lung, and Blood Institute
http://asthma.nationaljewish.org -- National Jewish Medical and Research Center
www.aafa.org -- Asthma and Allergy Foundation of America
www.aarc.org -- American Association for Respiratory Care

References

Glassroth J. The role of long-acting ß-agonists in the management of asthma: Analysis, meta-analysis, and more analysis. Ann Intern Med 2006 Jun 20; 144:936-7.

Kiljander TO, Harding SM, Field SK, Stein MR, Nelson HS, Ekelund J, et al. Effects of esomeprazole 40 mg twice daily on asthma: a randomized placebo-controlled trial. Am J Respir Crit Care Med. 2006 May 15;173(10):1091-7.

Review Date:
3/27/2007
Reviewed By:
Harvey Simon, MD, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital.

A.D.A.M. Copyright

adam.com

Sinusitis

FitSugar — Wed, 08 Oct 2008 17:35:28 -0700

In This Report

Highlights
Introduction
Causes
Risk Factors
Symptoms
Complications
Diagnosis
Prevention
Treatment for Acute Sinusit...
Treatment for Chronic Sinus...
Surgery
Resources
References

HEALTH GUIDE REFERENCE FROM A.D.A.M

Highlights

Drug Restriction

In February 2007, the FDA announced that the antibiotic telithromycin (Ketek) should no longer be used for treatment of acute bacterial sinusitis. In June 2006, the FDA reported that several people had died of liver damage after taking this drug. Telithromycin is now only approved for treatment of community-acquired pneumonia.

Acute Sinusitis Treatment

Antibiotics are widely over-prescribed for acute sinusitis, according to a 2007 study. Researchers also reported that inhaled corticosteroids are frequently prescribed for acute sinusitis, despite little evidence for their efficacy. Most cases of acute sinusitis resolve on their own and do not require antibiotic treatment.

Allergic Fungal Sinusitis

Allergic fungal sinusitis should be considered a distinct form of chronic sinusitis, according to research presented at the 2007 annual meeting of the American Academy of Allergy, Asthma, & Immunolology. Researchers found that patients with allergic fungal sinusitis have an increased allergic and inflammatory response to fungi compared to patients with other types of chronic sinusitis.

Anti-Fungal Drugs

Allergic fungal sinusitis is currently treated with oral corticosteroids such as prednisone, but researchers are investigating whether anti-fungal drugs may help. The anti-fungal drug Amphotericin B (SinuNase) is currently in Phase III trials for patients with chronic sinusitis who have had sinus surgery but are still experiencing sinusitis symptoms. However, several 2006 studies indicated disappointing results.

Balloon Sinuplasty

Balloon sinuplasty is a relatively new procedure that uses a catheter-inserted balloon to gently open and drain nasal passages. In a study of 115 patients with chronic sinusitis, balloon sinuplasty achieved promising results, according to research presented at the 2007 meeting of the American Academy of Otolaryngology–Head and Neck Surgery Foundation. However, some experts believe that it is still too early to recommend this procedure for wide-scale use, especially until further large-scale clinical trials are conducted.

Introduction

The skull contains a number of air-filled spaces called sinuses. They perform the following functions:

Reduce the weight of the skull
Provide insulation for the skull
Provide resonance for the voice

Four pairs of sinuses, known as the paranasal air sinuses, connect to the nasal passages (the two airways running through the nose) and are those that are involved in sinusitis. These sinuses are the following:

Frontal sinuses (behind the forehead)
Maxillary sinuses (behind the cheekbones)
Ethmoid sinuses (between the eyes)
Sphenoid sinuses (behind the eyes)

Healthy sinuses are sterile and contain no bacteria. (The nasal passage, on the other hand, normally contains many bacteria that enter through the nostrils.) Maintaining sinus health depends on a cycle that involves a number of important factors and processes:

The sinuses are lined with a membrane that secretes mucus. Mucus drains down into the nasal passage from a small channel in each sinus. The mucous membranes must be intact and free of injury.
The mucus must be fluid in order to flow freely while being sticky enough to absorb pollutants and entrap bacteria.
The mucus must also contain sufficient amounts of bacteria-fighting substances, including immune factors called antibodies.
Small, hair-like projections called cilia must beat in unison to propel mucus outward, expelling bacteria and other particles.
The sinus passages must be open to allow mucus drainage and the circulation of air through the nasal passage.

Click the icon to see an image of an antibody.

The Disease Process. Sinusitis is an infection that occurs if one or more of the defense processes or factors are amiss, causing obstruction, and bacterial growth occurs in the paranasal sinuses. Among the many causes of such obstruction or congestion are the common cold, allergies, certain medical conditions, abnormalities in the nasal passage, and change in atmosphere. In any of these cases, sinusitis can develop as follows:

Mucus drainage and airflow are blocked.
Secretions build up, encouraging the growth of certain bacteria.
The resulting infection, swelling, and inflammation create further blockage, which may cause the sinuses to close up completely.

Forms of Sinusitis. Sinusitis is classified as acute, subacute, or chronic, or recurrent. The classification is based on how long symptoms last:

Acute: Less than 4 weeks
Subacute: 4 - 8 weeks
Chronic: 8 weeks or longer
Recurrent: 3 or more acute episodes in 1 year

Causes

Bacteria are the most common direct cause of acute sinusitis. (Other organisms might be the infecting cause in less common cases.) The ability of bacteria or other organisms to infect the sinuses, however, must first be set up by conditions that create a favorable environment in the sinus cavities. Sinusitis is most often an acute condition, which is self-limiting and treatable. In some cases, however, the inflammation in the sinuses persists or is chronic do begin with. The causes for such chronic sinusitis cases are sometimes unclear.

The typical process leading to acute sinusitis starts with a flu or cold virus. Viruses themselves do not usually cause sinusitis directly and are implicated in only about 10% of sinusitis cases. Instead, they set the stage by causing inflammation and congestion in the nasal passages (called rhinitis) that leads to obstruction in the sinuses. This creates a hospitable environment for bacterial growth, which is the direct cause of sinus infection. In fact, rhinitis is the precursor to sinusitis in so many cases that expert groups now refer to most cases of sinusitis as rhinosinusitis.

Rhinosinusitis tends to involve the following sinuses:

The maxillary sinuses (behind the cheekbones) are the most common sites.
The ethmoid sinuses (between the eyes) are the second most common sites affected by colds.
The frontal (behind the forehead) and sphenoid (behind the eyes) sinuses are involved in about a third of cold-related cases.

Nearly everyone with colds has inflamed sinuses. These inflammations are typically brief and mild, however, and most people with colds do not develop true sinusitis.

Chronic or recurrent acute sinusitis typically results from one of the following conditions:

Untreated acute sinusitis that results in damage to the mucous membranes
Chronic medical disorders that cause inflammation in the airways or persistent thickened stagnant mucus (such as diabetes, AIDS or other disorders of the immune system, hypothyroidism, cystic fibrosis, Kartagener's syndrome, and Wegener's granulomatosis)
Structural abnormalities
Allergic reaction to fungi

Chronic or recurrent acute sinusitis can be a lifelong condition.

The Role of Bacteria. The role of bacteria or other infectious organisms is complicated in chronic sinusitis. They may play a direct, an indirect, or, in some patients, no role at all. For example, one study reported the following for patients with chronic sinusitis who had not responded to antibiotics:

30% had no evidence of bacteria in their passageways.
20% had bacteria unrelated to infection.

Inflammatory Response, Allergies, and Asthma. The absence of bacterial organisms as a causal factor in many cases suggests that some instances of chronic sinusitis may be due to a continuing inflammatory condition. Such on-going inflammation may have been triggered immune factors that were produced in response to injuries from acute sinusitis. Many of the immune factors observed in people with chronic sinusitis resemble those that appear in allergic rhinitis, suggesting that sinusitis in some individuals is due to an allergic response.

Allergies, asthma, and sinusitis often overlap. Those with allergic rhinitis (so-called hay fever and rose fever) often have symptoms of sinusitis, and true sinusitis can develop as a result of the mucus blockage it causes. A causal association, however, has not been proved, and many experts believe allergies themselves rarely predispose to sinusitis. People with chronic sinusitis may also have an allergic reaction to fungal organisms.

Severe asthma (which is often associated with allergies) and chronic sinusitis often overlap, although the relationship is unclear. Between 53 - 75% of children with asthma caused by allergies have sinus abnormalities, and various studies have shown that between 17 - 30% of asthmatic patients develop true sinusitis. In fact, chronic sinusitis may actually be the cause of asthma in some cases.

Abnormalities of the Nasal Passage. Abnormalities in the nasal passage can cause blockage and thereby increase the risk for chronic sinusitis. Some abnormalities include:

Polyps (small benign growths) in the nasal passage block mucus drainage and restrict airflow. Polyps themselves may be consequences of previous sinus infections that caused overgrowth of the nasal membrane.
Enlarged adenoids can lead to sinusitis.

Adenoids are masses of tissue located high on the posterior wall of the pharynx. They are made up of lymphatic tissue, which trap and destroy pathogens in the air that enter the nasopharynx.

Cleft palate
Tumors
Deviated septum (a common structural abnormality in which the septum, the center section of the nose, is shifted to one side, usually the left)

Click the icon to see an image of a deviated septum.

The bacteria most commonly implicated in sinusitis include:

Streptococcus pneumoniae (also called pneumococcal pneumonia or pneumococci). This bacterium is found in between 20 - 43% of adults and children with sinusitis.
H. influenzae (a common bacterium associated with many upper respiratory infections). This bacterium colonizes nearly half of all children by age 2, and causes about 25% of sinusitis cases in this group. Studies have reported the presence of this bacterium in 22 - 35% of adult sinusitis patients.
Moraxella catarrhalis. Over 75% of all children harbor this bacterium, which causes about 25% of sinusitis cases.

Other possible bacterial culprits include:

Other streptococcal strains
Staphylococcus aureus

While fungi are an uncommon cause of sinusitis, the incidence of such infections is increasing. At least 5 - 10% of chronic rhinosinusitis patients may actually have allergic fungal sinusitis. At the 2007 meeting of the American Academy of Allergy, Asthma, & Immunology (AAAAI), experts presented evidence suggesting that allergic fungal sinusitis is a distinct form of chronic rhinosinusitis. Research indicates that allergic fungal sinusitis may provoke a distinct immune response. In the AAAAI study, patients with allergic fungal sinusitis showed increased antibody levels of immunoglobulin E (IgE) and immunoglobulin G (IgG) compared to patients with other types of chronic rhinosinusitis.

In earlier research from 2004, scientists from the U.S. National Institute of Allergy and Infectious Diseases exposed immune cells from patients with chronic sinusitis and healthy volunteers to four common types of fungi: Alternaria, Aspergillus, Penicillium, and Cladosporium. The study’s findings suggested that some people who suffer from chronic sinusitis have an extreme immune and inflammatory response to fungi and may benefit from anti-fungal treatment.

Fungi involved in sinusitis include:

Aspergillus is the most common cause of all forms of fungal sinusitis.
Other fungi include Curvularia, Bipolaris, Alternaria, Dreschslera, Cryptococcus, Candida, Sporothrix,Exserohilum, and Mucormycosis.
There have been a few reports of fungal sinusitis caused by Metarrhizium anisopliae, which is used in biological insect control.

There are four categories of fungal sinusitis:

Acute or invasive fungal sinusitis - This infection is most likely to affect people with diabetes and compromised immune systems.
Chronic or indolent fungal sinusitis - This form is generally found outside the U.S., most commonly in the Sudan and northern India.
Fungus ball (mycetoma) - This fungal sinusitis is noninvasive and occurs usually in one sinus, most often the maxillary sinus.
Allergic fungal sinusitis - This form typically occurs because of an allergy to the fungus Aspergillus (rather than being caused by the fungus itself). In such cases, a peanut butter-like fungal growth occurs in the sinus cavities that may cause nasal passage obstruction and the erosion of the bones.

Fungal infections can be very serious, and both chronic and acute fungal sinusitis require immediate treatment. Fungal ball is not invasive and is nearly always treatable.

Fungal infections should be suspected in people with sinusitis who also have diabetes, leukemia, AIDS, or other conditions that impair the immune system. Fungal infections can also occur in patients with healthy immune systems but they are far less common.

Risk Factors

Sinusitis is one of the most common diseases in the United States. According to the National Institute of Allergies and Infectious Diseases (NIAID), it affects an estimate 37 million Americans each year. However, a 2004 report in the Archives of Otolaryngology - Head and Neck Surgery suggests that sinusitis may not be as common as previously reported. The researchers found that accounts that rely solely on patient self-reporting may be exaggerated.

Everyone gets viral colds and flu, and most people develop symptoms in the upper respiratory tract (air passages in the head and neck) at some point. Over 85% of people with colds have inflamed sinuses. These inflammations are typically brief and mild, however, and only between 0.5 - 10% of people with colds develop true sinusitis. (One study suggested that nose blowing during a cold may transmit bacteria back into the sinuses and increase the risk for sinusitis.) Studies suggest that the following population groups have higher risks for sinusitis:

Young children and the elderly are at higher risk for more serious upper respiratory tract infections and for complications from them.
Women appear to be at higher risk than men.
People living in the Midwest and South have a higher incidence of sinusitis than those in the Northeast and West.
People in higher income and educational groups appear to have a greater risk than those in lower groups.
Caucasian and African Americans have a higher rate than Hispanic Americans.

Before the immune system matures, all infants are susceptible to respiratory infections, with a possible frequency of one cold every 1 - 2 months. Young children are prone to colds and may have 8 - 12 bouts every year. Smaller nasal and sinus passages also make children more vulnerable to upper respiratory tract infections than older children and adults. Ear infections such as otitis media are also associated with sinusitis. Nevertheless, true sinusitis is very rare in children under 9 years of age. Some experts believe it is greatly overdiagnosed in this population.

The elderly are at specific risk for sinusitis. Their nasal passages tend to dry out with age. In addition, the cartilage supporting the nasal passages weakens causing airflow changes. They also have diminished cough and gag reflexes and faltering immune systems and are at greater risk for serious respiratory infections than are young and middle-aged adults.

People with asthma, allergies or both are at higher risk for non-infectious inflammation in the sinuses. The risk for sinusitis is higher in patients with severe asthma. People with a combination of polyps in the nose, asthma, and sensitivity to aspirin (called Samter's or ASA triad) are specifically at very high risk for chronic or recurrent acute sinusitis.

Hospitalized patients are at higher risk for sinusitis, particularly those with:

Head injuries
Conditions requiring insertion of tubes through the nose
Antibiotics or steroids treatment
Breathing aided by mechanical ventilators. (Such patients may have a significantly higher risk for maxillary sinusitis. In fact, treating sinusitis in such patients may significantly reduce the risk for ventilator-associated pneumonia.)

A number of medical conditions put people at risk for chronic sinusitis. They include:

Diabetes
Gastroesophageal reflux disease
Nasal polyps or septal deviation
AIDS and other disorders of the immune system predispose the patient to sinusitis (fungal infections are especially risky)
Pregnancy -- may cause temporary congestion and symptoms of sinusitis
Hypothyroidism -- causes congestion that clears up when the condition is treated
Cystic fibrosis -- a genetic disorder in which the mucus is very thick and builds up
Kartagener's syndrome
Wegener's granulomatosis -- a serious but very rare illness that causes long-term swelling and tumor-like masses in air passages

Dental Problems. Anaerobic bacteria are associated with infections from dental problems or procedures, which precipitate about 10% of cases of sinusitis.

Changes in Atmospheric Pressure. People who experience changes in atmospheric pressure, such as while flying, climbing to high altitudes, or swimming, risk sinus blockage and therefore an increased chance of developing sinusitis. (Swimming increases the risk for sinusitis for other reasons, as well.)

Cigarette Smoke and Other Air Pollutants. Air pollution from industrial chemicals, cigarette smoke, or other pollutants can damage the cilia responsible for moving mucus through the sinuses. Whether air pollution is an important cause of sinusitis and, if so, which pollutants are critical factors is still not clear. Cigarette smoke, for example, poses a small but increased risk for sinusitis in adults. Second-hand smoke does not appear to have any significant effect on adult sinuses, although it does seem to pose a risk for sinusitis in children.

Symptoms

Symptoms Indicating a Bacterial Infection. Sinus symptoms are very common during a cold or the flu, but in most of these cases they are due to the effects of the infecting virus and resolve when the infection does. It is important to differentiate between inflamed sinuses associated with cold or flu virus and sinusitis caused by bacteria. With true acute bacterial sinusitis, the signs and symptoms typically have the following course:

Nasal congestion and discharge comes first and is typically thick with pus that is yellowish to yellow-green.
Pain in the teeth is increased by bending over. Symptoms may vary, however, depending on the sinuses involved.
Symptoms continue for 10 days or more after the start of a cold or flu.
They worsen after 5 - 7 days, or they return after initial improvement in a cold (called double sickening).

Other symptoms of acute sinusitis that usually occur in adults include:

Severe headache and pain or pressure in specific areas in the face -- eyes may be red, bulging or painful eyes if the sinus infection occurs around the eyes; in some cases, patients may also have double vision and even temporary vision loss.
A persistent cough (particularly during the day)
Fever
Fatigue (from lack of good rest)
Lack of response to decongestants or antihistamines

Sneezing, sore throat, and muscle aches may be present, but they are rarely caused by sinusitis itself. Muscle aches may be caused by fever, sore throat by post-nasal drip, and sneezing from cold or allergies.

Rare complications of sinusitis can produce additional symptoms, which may be severe or even life threatening.

Symptoms in Children. Children are most likely to develop infection in the ethmoid sinuses, located between the eyes. Children with sinusitis are also less likely to experience facial pain over the affected sinus and headache, which are the primary signs in adults. Symptoms of bacterial sinusitis may be less specific than in adults and include:

Persistent nasal discharge (of any type) and day time cough for more than 10 days, or
Severe symptoms last for at least 3 - 4 days in a row and include thick, greenish nasal discharge plus a fever of at least 102° F.

Other symptoms in children may include:

Irritability
Vomiting
Gagging on mucus
Cough

Recurrent acute and chronic sinusitis tend to take the following course:

Symptoms are more vague and generalized than acute sinusitis.
They last longer than 4 weeks. (Subacute sinusitis lasts longer than 4 weeks but less than 8 weeks. Chronic sinusitis lasts 8 weeks or longer.)
They occur throughout the year, even during nonallergy seasons.

Specifically symptoms may include:

Nasal congestion and obstruction
Chronic cough (day and night) -- research suggests that sinusitis is one of the main causes of chronic cough
Bad breath
Postnasal drip (which can cause repeated throat clearing)
Facial tenderness or pressure --patients do not usually experience facial pain unless the infection is in the frontal sinuses

Specific symptoms depend on the location of the infection:

Frontal sinusitis causes pain across the lower forehead.
The pain in maxillary sinusitis occurs over the cheeks and may travel to the teeth, and the hard palate in the mouth sometimes becomes swollen.
Ethmoid sinusitis causes pain behind the eyes and sometimes redness and tenderness in the area across the top of the nose.
Sphenoid sinusitis rarely occurs by itself; when it does, the pain may be experienced behind the eyes, across the forehead, or in the face.



ETHMOID SINUSITIS
Ethmoid sinuses are located between the eyes. They resemble a honeycomb and are vulnerable to obstruction. This is a common location for sinusitis in children.	Nasal congestion. Nasal discharge or postnasal drip. Pain or pressure around the inner corner of the eye or down one side of the nose. Headache in the temple or surrounding the eye. Symptoms worse when coughing, straining, or lying on the back and better when the head is upright. Fever. Symptoms of maxillary sinusitis often occur. Symptoms indicating medical emergency: Increasing severity of symptoms. Fever, swelling and drooping eyelid, loss of eye movement (possible orbital infection, which is in the eye socket). Fever, vision changes, pupil fixed or dilated. Symptoms spreading to both sides of face (may indicate blood clot).	Chronic nasal discharge, obstruction, and low-grade discomfort usually across the bridge of the nose. Symptoms worse in the late morning or when wearing glasses. Chronic sore throat and bad breath. Sinusitis also can recur in other sites.
ACUTE MAXILLARY SINUSITIS
Maxillary sinuses are located behind the cheek bones. They are present at birth and continue to develop as long as teeth erupt. Tooth roots, in some cases, can penetrate the floor of these sinuses.	Pain across the cheekbone, under or around the eye, or around the upper teeth; may occur on one or both sides of the face. Area over the cheekbone is tender and may be red or swollen. Possibly tooth pain. Symptoms are worse when the head is upright and improve when patient reclines. Nasal discharge or postnasal drip. Fever.	Discomfort or pressure below the eye. Chronic toothache. Symptoms become worse with colds, flu, or allergies. Discomfort increases during the day. Coughing increases at night.
FRONTAL SINUSITIS
Frontal sinuses are located on both sides of the forehead. These sinuses are late in developing, so infection here is uncommon in children.	Severe headache in the forehead. Fever (common but not always present). Symptoms are worse when lying on the back and when pressing against the area over the eye on the side closest to the nose. Symptoms are better when the head is upright. Nasal discharge or postnasal drip. Symptoms indicating medical emergency: Increasing severity of symptoms, particularly severe headache, altered vision, mild personality or mental changes (may indicate spread of infection to brain). Fever, vision changes, fixed or dilated pupil. Symptoms spreading to both sides of face (may indicate blood clot). Headache, fever, along with a soft swelling over the bone (may indicate bone infection).	Persistent, low-grade headache in the forehead. History of physical injury or other damage to the sinus area.
SPHENOID SINUSITIS
Sphenoid sinuses are located behind the eyes. They usually are present by age 3 and are fully developed by age 12.	Deep headache with pain in many places, including the back and top of the head, across the forehead, and behind the eye. Fever. Symptoms are worse when lying on the back or bending forward. Nasal discharge or postnasal drip. Symptoms indicating medical emergency: Increasing severity of symptoms, particularly severe headache, altered vision, mild personality or mental changes (may indicate spread of infection to brain).	Low grade, general headache (although not always present).

Complications

Bacterial sinusitis is nearly always harmless (although uncomfortable and sometimes even very painful). If an episode becomes severe, antibiotics generally eliminate further problems. In rare cases, however, sinusitis can be very serious.

Osteomyelitis. Adolescent males with acute frontal sinusitis are at particular risk for severe problems. One important complication is infection of the bones (osteomyelitis) of the forehead. In such cases, the patient usually experiences headache, fever, and a soft swelling over the bone known as Pott's puffy tumor.

Infection of the Eye Socket. Infection of the eye socket, or orbital infection, which causes swelling and subsequent drooping of the eyelid, is a rare but serious complication of ethmoid sinusitis. In these cases, the patient loses movement in the eye, and pressure on the optic nerve can lead to vision loss, which is sometimes permanent. Fever and severe illness are usually present.

Blood Clot. Another danger, although rare, from ethmoid or frontal sinusitis are blood clots. If a blood clot forms in the sinus area around the front and top of the face, symptoms are similar to orbital infection. In addition, the pupil may be fixed and dilated. Although symptoms usually begin on one side of the head, the process usually spreads to both sides.

Widespread Infection. The most dangerous complication of sinusitis, particularly frontal and sphenoid sinusitis, is the spread of infection by anaerobic bacteria to the brain, either through the bones or blood vessels. Abscesses, meningitis, and other life-threatening conditions may result. In such cases, the patient may experience mild personality changes, headache, altered consciousness, visual problems, and, finally, seizures, coma, and death.

Chronic and acute fungal sinusitis caused by the fungi Aspergillus and mucormycosis is difficult to treat and potentially lethal, particularly in people with diabetes and compromised immune systems. Mucormycosis is particularly dangerous if it is not treated quickly. Fungal ball (mycetoma) is not invasive and is nearly always treatable with surgery. Recurrence is rare.

The relationship between sinusitis and asthma is unclear. A number of theories have been proposed for a causal or shared association between sinusitis and asthma. Some include the following:

Stimulation of nerve pathways, inflammation, and overproduction of mucus in the nasal passages and sinus cavities may eventually affect the airways in the lung, causing them to hyperreact.
Breathing through the mouth when the sinuses are blocked allows in large particles that would other wise be filtered by the nasal defense system. Such particles could trigger allergic responses in the lungs that can trigger asthma in susceptible people.
Air breathed through the mouth is colder than air warmed in the nasal passages. Cold air is a known trigger of asthma.
Both may share similar immune abnormalities that cause inflammation in the airways in the lungs and sinuses.

Successful treatment of both allergic rhinitis and chronic sinusitis in children who also have asthma may reduce symptoms of asthma. It is particularly important to treat any coexisting bacterial sinusitis in people with asthma. They might not respond to asthma treatments unless the infection is cleared up first.

Pain and other symptoms of chronic sinusitis can have significant effects on the quality of life. This condition can cause emotional distress, impair normal activity, and reduce attendance at work or school. According to the American Academy of Allergy, Asthma, and Immunology, the average sinusitis patient misses about 4 work days a year. In fact, a 2003 study placed sinusitis in the top 10 medical conditions that most adversely affect American employers. In addition, some people may lose their sense of smell. Surgery or medical treatments can help restore this sense.

Diagnosis

Patients who have sinusitis symptoms that do not clear up within a few days, are severe, or are accompanied by high fever or acute illness should see a doctor. However, that only one-half to two-thirds of patients with such symptoms actually have sinusitis. Some experts complain that too many patients are diagnosed with true sinusitis and given unnecessary antibiotics when their symptoms would actually resolve easily in days with over-the-counter medications or no drugs at all. Others believe that true sinusitis is often mistakenly diagnosed as an allergy and not treated, which could lead to serious illness.

The first goal in diagnosing sinusitis is to rule out other possible causes of symptoms, and then determine:

The site where the infection has occurred
Whether the condition is acute or chronic
The organism causing the infection (if possible)

Ruling Out Sinus Symptoms Due to Cold or Flu Viruses. It is often difficult to tell when a viral infection converts to a bacterial infection. Studies have found that between 40 - 85% of patients with the common cold show signs of inflamed sinuses on x-rays or CT scans. A cold, however, unlike sinusitis, typically clears up without treatment within a week. (Only about 0.5 - 2% of adults with viral colds or flus actually develop bacterial infections.) In general, the doctor should suspect a bacterial infection under the following circumstances:

If sinus symptoms persist for 10 days or longer after a cold or flu, or
If symptoms become worse after 5 - 7 days

Ruling Out Allergies. Symptoms of both sinusitis and allergic rhinitis include nasal obstruction and congestion. The conditions often occur together. People with allergies and no sinus infection may have:

Thin, clear, and runny nasal discharge
Itchy nose, eyes, or throat (do not occur with bacterial sinusitis)
Recurrent sneezing
Symptoms of allergies appear only during exposure to allergens

Ruling Out Migraine and Other Headaches. Many primary headaches, particularly migraine or cluster, may closely resemble sinus headache. In fact, results presented at a 2004 meeting of the American Headache Society suggest that 90% of people who thought they had a sinus headache actually had migraines. Migraine and sinus headaches may even coexist in many cases. Sinus headaches are usually more generalized than migraines, but it is often difficult to tell them apart, particularly if headache is the only symptom of sinusitis. The following symptoms suggest a migraine rather than a sinus headache:

The headache is recurrent
It has a significant impact on daily activities
The headache does not get worse over time

Ruling Out Neuralgia. In some cases, headache that persists after successful treatment of chronic sinusitis may be due to neuralgia (nerve-related pain) in the face. This condition requires specific drugs, such as tricyclic antidepressants or carbamazepine. Trials using such drugs may identify patients with neuralgia and help avoid unnecessary invasive treatments for chronic sinusitis.

Ruling Out Other Conditions. A number of other conditions can mimic sinusitis. They include:

Dental problems
A foreign object in the nasal passage
Temporal arteritis (headache caused by inflamed arteries in the head and neck)
Persistent upper respiratory tract infections
Chronic fatigue syndrome (CFS) or fibromyalgia. However, researchers reported in the Archives of Internal Medicine that there may be a link between CFS and sinusitis. In the study, patients with unexplained chronic fatigue were nine times more likely to suffer sinus problems than those without fatigue.
Temporomandibular disorders (problems in the joints and muscles of the jaw hinges)
Vasomotor rhinitis, a condition in which the nasal passages become congested in response to irritants or stress. It often occurs in pregnant women.

Medical History. The patient should describe all symptoms such as nasal discharge and specific pain in the face and head, including eye and tooth pain.

After assessing symptoms, the doctor should take a thorough medical history of the patient:

Any history of allergies or headaches
Recent upper respiratory infection (colds, flus, infection)
History of sinusitis episodes that is unresponsive to antibiotic treatment. (In such cases, the doctor will usually diagnose chronic or recurrent acute sinusitis and refer the patient to a specialist for more advanced testing.)
Exposure to cigarette smoke or other environmental pollutants
Recent travel
Recent dental procedures, particularly if there is pain toward the back of the mouth
Medications being taken (particularly decongestants)
Any known structural abnormalities in the nose and face
Injury to the head or face
History of medical conditions, such as chronic fatigue syndrome or fibromyalgia, which can produce tender areas in the face or sinus regions and nonspecific symptoms of ill health
Any family history of allergies, immune disorders, cystic fibrosis, or immotile cilia syndrome
In small children with sinusitis, whether they attend a day care center or nursery school

The doctor will press the forehead and cheekbones to check for tenderness and check for other signs of sinusitis, including yellow to yellow-green nasal discharge. The doctor will also check the inside of the nasal passages using a device with a bright light to check the mucus and look for any structural abnormalities.

In some cases, tests may be used to detect that presence of immune factors in sinus tissues that would suggest persistent inflammation. Such findings would strongly suggest a chronic or allergic condition. In 2005, a new laboratory test became available for diagnosing chronic sinusitis. The CRS Fungal Profile tests mucus samples for eosinophil major basic protein (a protein involved in allergic and inflammatory reactions) and a type of fungi.

Nasal endoscopy, or rhinoscopy, is now used for diagnosing chronic and recurrent acute sinusitis and for differentiating between allergies and true acute sinusitis. It involves the insertion of a flexible tube into the nasal passage and the use of a fiberoptic light that enables the doctor to see inside the sinuses. Endoscopy allows detection of even very small abnormalities in the sinuses. It can determine whether surgery is necessary and if medications are having any effect. Bacterial cultures can also be taken from samples removed using endoscopy. (Endoscopy is also used for treating sinusitis.)

Computer Tomography. Computed tomography (CT) scanning is the best method for viewing the paranasal sinuses. There is little relationship, however, between symptoms in most patients and findings of abnormalities on a CT scan. CT scans are recommended for acute sinusitis only if there is a severe infection, complications, or a high risk for complications. CT scans are useful for diagnosing chronic or recurrent acute sinusitis and for surgeons as a guide during surgery. They show inflammation and swelling and the extent of the infection, including that in deep hidden air chambers missed by x-rays and nasal endoscopy. Often, they can detect the presence of fungal infections.

X-Rays. Until the availability of endoscopy and CT scans, x-rays were commonly used. They are not as accurate, however as these procedure in identifying abnormalities in the sinuses. For example, more than one x-ray is needed for diagnosing frontal and sphenoid sinusitis. X-rays do not detect ethmoid sinusitis at all, which can be the primary site of an infection that has spread to the maxillary or frontal sinuses.

Magnetic Resonance Imaging. MRI is not as effective as CT in defining the paranasal anatomy and therefore is not typically used to image the sinuses for suspected sinusitis. MRI is also more expensive than CT. However, it can help rule out fungal sinusitis and may help differentiate between inflammatory disease, malignant tumors, and complications within the skull. It may also be useful for showing soft tissue involvement.

Transillumination is a procedure aimed at visualizing maxillary and frontal sinuses. First the doctor shines a bright light against the patient's cheek or forehead in a completely darkened room. If the sinuses are clear, the doctor will observe a glow on the hard palate of the open mouth or in the areas of the cheek where the sinus passages are located. It is fast, safe, and inexpensive, but it is useful only in adults and only to rule out any problems. It has largely been supplanted by more accurate diagnostic techniques.

Sinus puncture with bacterial culture is the gold standard for diagnosing a bacterial sinus infection. It is invasive, however, and is performed only when antibiotics have not worked. Sinus puncture involves using a needle to withdraw a small amount of fluid from the sinuses. It requires a local anesthetic and is performed by a specialist. The fluid is then cultured to determine what type of bacteria is causing sinusitis.

Prevention

The best way to prevent sinusitis is to avoid colds and influenza. If you are unable to avoid them, the next best way to prevent sinusitis is to effectively treat colds and influenza.

Colds and flu are spread primarily when an infected person coughs or sneezes near someone else. A very common method for transmitting a cold is by shaking hands. Everyone should always wash their hands before eating and after going outside. Ordinary soap is sufficient. Waterless hand cleaners that contain an alcohol-based gel are also effective for every day use and may even kill cold viruses. (They are less effective, however, if extreme hygiene is required. In such cases, alcohol-based rinses are needed.) Antibacterial soaps add little protection, particularly against viruses. In fact, one study suggests that common liquid dish washing soaps are up to 100 times more effective than antibacterial soaps in killing respiratory syncytial virus (RSV), which is known to cause pneumonia. Wiping surfaces with a solution that contains one part bleach to 10 parts water is very effective in killing viruses.

Colds are not caused by insufficiently warm clothes or by going outside with wet hair. A 2002 study reported, however, that in older adults cold temperatures can thicken the blood and may increase the risk for respiratory infections and even circulatory and heart problems.

Foods Containing Lactobacilli (Good Bacteria). Researchers are studying the possible protective value of certain strains of lactobacilli bacteria found in the intestines. Some of these strains, particularly acidophilus, are used to make yogurt. According to one study, milk containing the strain lactobacilli GG helped reduce respiratory infections in children attending day care by 10 - 20%.

Vitamins. Studies are mixed whether vitamin supplements protect against upper respiratory infections. Large doses of vitamin C, for example, may help reduce the duration of a cold, but they do not appear to protect against one in the first place, even after exposure to a cold virus. Two studies in 2002 on multivitamins reported opposite results, with one finding fewer infections and one finding no difference. It is possible that vitamin C or multivitamin supplements may be helpful in specific people, such those who are vitamin deficient or have medical problems that impair their immune systems.

Studies on vitamin E specifically have been largely negative. A 2002 study, in fact, reported a higher incidence and greater severity of respiratory infections in older adults who took 200 mg of vitamin E daily.

Breastfeeding. Evidence suggests that women who breastfeed reduce the risk of respiratory infections in their children. The American Academy of Pediatrics recommends that babies be fed exclusively breastmilk for their first 6 months.

Low Stress and Active Social Life. More than one study has reported that people with low stress who also have an active social life have fewer colds than people who have high stress levels or those who have low stress and few social connections.

Zinc appears to have certain important effects on the immune system and it may have a direct effect on viruses. How it works is not entirely clear, however. Zinc preparations in lozenge or nasal gel form are now available as cold treatments. Studies are very mixed on the effects of zinc on colds.

A nasal gel (Zicam), which contains zinc gluconate, has shown some success, possibly because the gel sticks to the nasal passages long enough for the zinc to interact with the virus. In a 2003 study, for example, the nasal gel shortened the duration and severity of the cold compared to placebo when it was started within 14 - 48 hours of the onset of symptoms. The supports earlier studies reporting that it shortened the duration of a cold by about 2 days.
Zinc lozenges are showing mixed results. One 2000 study suggested that the use of zinc acetate lozenges may be more effective and have a better taste than other formulations, such as zinc gluconate. On the other hand, a 2002 study reported that zinc gluconate reduced cold duration significantly. To further confuse matters, the two zinc lozenge preparations were directly compared in a 2000 study, and neither was effective.

In any case, no one with an adequate diet and a healthy immune system should take zinc for prolonged periods for preventing colds. Long-term use of zinc (100 mg or higher daily) has been associated with heart problems, anemia, and other conditions.

Side Effects. Side effects of zinc include:

Dry mouth
Constipation
Nausea
Bad taste (possibly only with zinc gluconate lozenges)
Overdose may cause severe vomiting, dehydration, and restlessness. Call a doctor if any of these symptoms occur.
In rare cases, an allergic response may occur.

Food and Drug Interactions. Zinc may also interact with drugs or food:

Zinc may reduce absorption of certain antibiotics.
Foods high in calcium or phosphorus may reduce zinc absorption.
In high doses, and for long periods of time, zinc can cause copper deficiencies.

The following are special concerns for people taking natural remedies for sinusitis:

Echinacea is commonly taken to prevent onset and ease symptoms of cold or flu. However, a rigorous study published in 2005 in the New England Journal of Medicine determined that echinacea does not help to prevent or treat colds. In addition, allergic reactions have been reported. People with autoimmune diseases or plant allergies should particularly avoid this herbal remedy. Echinacea has also been associated with a reaction called erythema nodosum. This involves a rash, sometimes accompanied by fever, headache, muscle and joint aches, and sore throat.
Grapeseed extract is sometimes touted as a natural antihistamine. A 2002 study, however, reported no benefits from it.
Chinese herbal products containing aristolochic acid have been associated with several reports of kidney failure in Europe. Some studies suggest that up to 30% of herbal patent remedies imported from China are laced with potent pharmaceuticals such as phenacetin and steroids. Chinese herbal remedies can also contain toxic metals such as lead.

Vaccines against influenza use inactivated (not live) viruses. Because influenza viruses change from year to year, influenza vaccines are redesigned annually to match the anticipated viral strains. Experts recommend that people receive annual influenza vaccinations in October or November. People who should definitely be vaccinated include: all adults 65 years or older; children age 6 months - 5 years; other adults or children who are at high risk for developing serious medical complications from influenza; health care workers and others who care for individuals who are at high risk for influenza complications. [See In-Depth Report #94: Colds and influenza.]

The pneumococcal vaccine protects against S. pneumoniae (also called pneumococcal) bacteria, the most common cause of respiratory infections. There are two effective vaccines available, one called a 23-valent polysaccharide vaccine (Pneumovax, Pnu-Immune) for adults and a 7-valent conjugate vaccine (Prevnar or PCV7) for infants and young children. Experts are now recommending that more people, including healthy elderly people, be given the pneumococcal vaccine, particularly in light of the increase in antibiotic-resistant bacteria. [See In-Depth Report #64: Pneumonia.]

Treatment for Acute Sinusitis

The primary objectives for treatment of sinusitis are reduction of swelling, eradication of infection, draining of the sinuses, and ensuring that the sinuses remain open. Less than half of patients reporting symptoms of sinusitis need aggressive treatment. Home remedies can be very useful.

Home remedies that open and hydrate sinuses may, indeed, be the only treatment necessary for mild sinusitis that is not accompanied by signs of acute infection.

Drinking plenty of fluids and getting lots of rest when needed is still the best bit of advice to ease the discomforts of the common cold. Water is the best fluid and helps lubricate the mucous membranes. (There is no evidence that drinking milk will increase or worsen mucus, although milk is a food and should not serve as fluid replacement.)
Chicken soup does indeed help congestion and aches. The hot steam from the soup may be its chief advantage, although laboratory studies have actually reported that ingredients in the soup may have anti-inflammatory effects. In fact, any hot beverage may have similar soothing effects from steam. Ginger tea, fruit juice, and hot tea with honey and lemon may all be helpful.
Spicy foods that contain hot peppers or horseradish may help clear sinuses.
Inhaling steam 2 - 4 times a day is extremely helpful, costs nothing, and requires no expensive equipment. The patient should sit comfortably and lean over a bowl of boiling hot water (no one should ever inhale steam from water as it boils) while covering the head and the bowl with a towel so the steam remains under the cloth. The steam should be inhaled continuously for 10 minutes. A mentholated or other aromatic preparation may be added to the water. Long, steamy showers, vaporizers, and facial saunas are alternatives.

Many people take medications to reduce mild pain and fever. Adults most often choose aspirin, ibuprofen (Advil), or acetaminophen (Tylenol).

The following are recommendations for children:

Acetaminophen (Tylenol) or ibuprofen (usually Advil or Motrin) is the pain-reliever of choice in children. Most pediatricians advise such medications for children who run fevers over 101°F.
Aspirin and aspirin-containing products are virtually never recommended for children or adolescents. Reye syndrome, a very serious condition, has been associated with aspirin use in children who have flu symptoms or chicken pox.

Some studies suggest that these anti-fever drugs may actually reduce the body's immune response against cold and flu viruses and prolong symptoms. A 2000 study, for example, reported a longer flu duration in people who took aspirin or acetaminophen (although people still felt better). Nevertheless, most doctors strongly recommend lowering fevers in children, since high fevers can sometimes cause seizures.

A nasal wash can be helpful for removing mucus from the nose. A saline solution can be purchased at a drug store or made at home. (Mix 1 teaspoon of table salt with a pinch of baking soda in 2 cups of warm water.) The nasal wash should be performed several times a day. Researchers have reported that daily irrigation of the nasal passages with a hypertonic saline solution relieves sinusitis symptoms and also reduces antibiotic use and the occurrence of acute exacerbations. Patients in the study had 72% fewer sinus infections, a 69% improvement in breathing, and they reduced medication usage by more than half.

A simple method for administering a nasal wash is:

Lean over the sink head down.
Pour some solution into the palm of the hand and inhale it through the nose, one nostril at a time.
Spit the remaining solution out.
Gently blow the nose.

The solution may also be inserted into the nose using a large rubber ear syringe, available at a pharmacy. In this case the process is:

Lean over the sink head down.
Insert only the tip of the syringe into one nostril.
Gently squeeze the bulb several times to wash the nasal passage.
Then press the bulb firmly enough so that the solution passes into the mouth.
The process should be repeated in the other nostril.

Decongestants are drugs that help reduce nasal congestion. They are available in a pill or nasal form. However, decongestants will not cure sinusitis. Nasal decongestants can actually worsen sinusitis by increasing sinus inflammation. Due to the lack of evidence for nasal decongestants’ benefits for sinusitis, the FDA has ruled that manufacturers of over-the-counter (OTC) nasal decongestant products remove from their labeling all references to sinusitis.

Your doctor may still recommend that you take either an OTC or prescription nasal decongestant to help relieve blockage symptoms associated with sinusitis. If you think you have sinusitis, it is important that you check with your doctor before taking a decongestant. Do not try to treat sinusitis by yourself.

Nasal Decongestants. Nasal decongestants come in long-acting or short-acting forms. The effects of short-acting decongestants last about 4 hours; long-acting decongestants last 6 - 12 hours. The active ingredients in nasal decongestants include oxymetazoline, xylometazoline, and phenylephrine.

Tips for Use. The following precautions are important for people taking nasal decongestants:

When using a nasal spray, spray each nostril once. Wait a minute to allow absorption into the mucosal tissues, and then spray again.
Do not share droppers and inhalators with other people.
Discard sprayers, inhalators, or other decongestant delivery devices when the medication is no longer needed. Over time, these devices can become reservoirs for bacteria.
Discard the medicine if it becomes cloudy or unclear.

Decongestants Taken by Mouth. Pseudoephedrine is the only decongestant taken by mouth that is currently available over-the-counter (OTC) in the United States. It decreases the volume of mucous in the nose, as well as within the Eustachian tubes. Many brands of OTC oral decongestants are available. A common brand is Sudafed. Oral decongestants such as Sudafed can also be helpful for relieving cough associated with postnasal drip.

Warning: Anyone with old forms of any decongestant should check the labels and discard them if they contain phenylpropanolamine. In November 2000, the FDA banned products, including decongestants, which contained phenylpropanolamine (PPA). This action was in response to a few reports of an increased risk of stroke. (Stroke tended to occur in people who took diet suppressants containing PPA rather than decongestants. In any case, serious events were still very rare.) All major brands that previously contained PPA have now substituted other active ingredients (usually pseudoephedrine) and are safe to use.

Side Effects of Decongestants. Decongestants have certain adverse effects, which are more apt to occur in oral than nasal decongestants and include:

Agitation and nervousness
Drowsiness (particularly with decongestants taken by mouth and in combination with alcohol)
Changes in heart rate and blood pressure
Avoid combinations of oral decongestants with alcohol or certain drugs, including monoamine oxidase inhibitors (MAOI) and sedatives

Heart disease
High blood pressure
Thyroid disease
Diabetes
Prostate problems that cause urinary difficulties
Migraines
Raynaud's phenomenon
High sensitivity to cold
Emphysema or chronic bronchitis. (Such individuals should particularly avoid high-potency short-acting nasal decongestant.)
People taking medications that increase serotonin levels, such as certain antidepressants, anti-migraine drugs, diet pills, St. John's wort, and methamphetamine. The combinations can cause blood vessels in the brain to narrow suddenly, causing severe headaches and even stroke.

Anyone with these conditions should not use either oral or nasal decongestants without a doctor's guidance. Other groups who should not use these drugs without first consulting a doctor include:

Pregnant women
Children. The American College of Chest Physicians advises against the use of over-the-counter decongestants and other cold medications in children ages 14 years or younger. Children are at particular risk for side effects that depress the central nervous system. Such symptoms cause changes in blood pressure, drowsiness, deep sleep, and, rarely, coma. In 2007, the FDA began reviewing the safety and effectiveness of cough and cold remedies for children.

Older antihistamines such as diphenhydramine (Benadryl) are helpful in relieving cough when used alone or in combination with a decongestant.

Expectorants are drugs that cause mucus to be coughed up from the lungs. The most common type used is guaifenesin, which is found in many over-the-counter (OTC) cough syrups as well as prescription products. Expectorants used to be recommended for treatment of sinusitis-associated cough, but some recent guidelines advise against their use. According to the American College of Chest Physicians (ACCP), expectorants and cough suppressants do not help treat cough. The ACCP recommends that adults instead take a decongestant or antihistamine to relieve cough. The ACCP also recommends against OTC cold and cough medicine for children ages 14 years and younger. Parents should talk with their child’s pediatrician for advice on treating cough.

Overview on Antibiotics and Their Overuse. Sinusitis is the fifth most common diagnosis for antibiotic prescriptions. And, there is much evidence that antibiotics are inappropriately prescribed for many patients:

According to a 2007 study of recent treatment patterns for acute and chronic sinusitis, antibiotics are widely overused. The researchers noted that viruses (not bacteria) account for a large percentage of acute sinusitis cases and that most acute sinusitis cases clear up on their own. The study also indicated that inhaled corticosteroids are frequently prescribed for acute sinusitis despite a lack of evidence for their benefit.
A major analysis reported that antibiotics helped only 1 child in 8 who had persistent nasal discharge for at least 20 days. Even when antibiotics were helpful, benefits were modest in reducing duration of the infection. This study supports other research that has found no significant benefit from antibiotics for most children. In a 2001 study, for example, 87% of children improved regardless of their treatment.

The intense and widespread use of antibiotics -- not only for sinusitis but also for other upper respiratory tract infections -- is leading to a serious global problem, which is bacterial resistance to common antibiotics. For example, according to reports in 2002 and 2001, in Canada 15% of S. pneumoniae strains are resistant to penicillin; in the U.S. 30 - 40% are resistant; in Hong Kong 70 - 80% of strains no longer respond to penicillin. Furthermore, in the U.S. about 23% of S. pneumoniae are currently resistant to at least three antibiotics. High rates of resistance strains are even being observed in infants. In general, regions with the highest rate of resistance are those in which antibiotics are the most heavily prescribed. Encouraging studies are now reporting that inappropriate antibiotic prescriptions are on the decline.

When to Use Antibiotics. Because the majority of sinusitis cases resolve on their own, doctors generally wait 10 - 14 days before prescribing antibiotics. However, antibiotics may be prescribed sooner if severe symptoms develop. These symptoms include:

Fever
Facial pain or tenderness
Swelling around the eyes

Antibiotic Regimens

The standard first-line antibiotic treatment for acute bacterial sinusitis is a 10 - 14 day course of amoxicillin. Trimethoprim-sulfamethoxazole is an alternative choice.
If no change occurs within 3 - 5 days, the doctor may prescribe a different type of antibiotic such as amoxicillin-clavulanate, cephalosporin, or a macrolide.
If the patient does not respond after 21 - 28 days, broad-spectrum antibiotics such as amoxicillin-clavulanate, cefuroxime, or cefpodoxime may be used. Other choices include clarithromycin or azithromycin (macrolides) or levofloxacin (a fluoroquinolone).

Side Effects of Antibiotics. Most antibiotics have the following side effects (although specific antibiotics may have other side effects or fewer of the standard ones):

The most common side effect for nearly all antibiotics is gastrointestinal distress.
Antibiotics double the risk for vaginal infections in women. Taking supplements of acidophilus or eating yogurt with active cultures may help restore healthy bacteria that offset the risk for such infections.
Allergic reactions can also occur with all antibiotics but are most common with medications derived from penicillin or sulfa. These reactions can range from mild skin rashes to rare but severe, even life-threatening anaphylactic shock.
Certain drugs, including some over-the-counter medications, interact with antibiotics; patients should inform the doctor of all medications they are taking and of any drug allergies.

Beta-Lactams

The beta-lactam antibiotics share common chemical features and include penicillins and cephalosporins. Their primary action is to interfere with bacterial cell walls.

Penicillins. Amoxicillin (Amoxil, Polymox, Trimox, Wymox, or any generic formulation) has been the most widely prescribed antibiotic for acute sinusitis. This penicillin is both inexpensive and at one time was highly effective against the S. pneumoniae bacteria. Unfortunately, bacterial resistance to amoxicillin has increased significantly, both among S. pneumoniae and H. influenzae, and penicillin is no longer as reliable as it once was.

Amoxicillin-clavulanate (Augmentin) is a type of penicillin that works against a wide spectrum of bacteria. An extended release form has been approved for treating adults with sinusitis infections that have become resistant to penicillin.

Many people have a history of an allergic reaction to penicillin, but some evidence is suggesting that the allergy may not recur in a significant number of adults. Skin tests are available that could determine if some people previously allergic could use these important antibiotics.

Cephalosporins. These drugs are also effective against S. pneumoniae. They are often classed by generation:

First generation includes cephalexin (Keflex), cefadroxil (Duricef, Ultracef), and cephradine (Velosef).
Second generation include cefaclor (Ceclor), cefuroxime (Ceftin), cefprozil (Cefzil), and loracarbef (Lorabid).
Third generation include cefpodoxime (Vantin), cefdinir (Omnicef) cefditoren (Sprectracef), cefixime (Suprax), and ceftibuten (Cedex). Ceftriaxone (Rocephin) is an injected cephalosporin. These are effective against a wide range of bacteria.

The later-generation antibiotics cefpodoxime, cefdinir, and cefuroxime are good choices for penicillin-allergic patients with mild-to-moderate sinusitis who have been treated in the previous 4 - 6 weeks. Penems, a type of beta-lactam antibiotic, are also being investigated for sinusitis treatment.

Macrolides and Azalides

Macrolides are a class of antibiotics that are divided into different sub-groups. Azalides are one of those sub-groups. This type of antibiotic is often used to treat mild-to-moderate bacterial sinusitis in patients who are allergic to penicillin. Some of the most common macrolids/azalides are azithromycin (Zithromax), clarithromycin (Biaxin), and roxithromycin (Rulid). An extended-release form of azithromycin (Zmax) was approved in 2005 as a single dose treatment for mild-to-moderate acute bacterial sinusitis. These antibiotics are also effective against many strains of S. pneumoniae and M. catarrhalis, but macrolide-resistance rates doubled between 1995 - 1999 as the number of children treated with the antibiotics increased. Erythromycin is not effective against H. influenzae.

Macrolides have anti-inflammatory actions, which may have benefits for some patients with chronic sinusitis. Investigators are studying long-term low-dose macrolide treatments, which are not intended to eliminate bacteria, but to reduce inflammation. Studies suggest that this approach may be effective without increasing the risk for bacterial resistance.

Trimethoprim-Sulfamethoxazole

Trimethoprim-sulfamethoxazole (Bactrim, Cotrim, Septra) is another first-line antibiotic for sinusitis. It is less expensive than amoxicillin and particularly useful for patients with mild sinusitis who are allergic to penicillin. It is no longer effective, however against certain streptococcal strains. It should not be used in patients whose infections occurred after dental work or in patients allergic to sulfa drugs. Allergic reactions can be very serious.

Fluoroquinolones (Quinolones)

Fluoroquinolones (also simply called quinolones) interfere with the bacteria's genetic material so they cannot reproduce.

Newer generation fluoroquinolones, which include levofloxacin (Levaquin), sparfloxacin (Zagam), gatifloxacin (Tequin), and moxifloxacin (Avelox), are currently the most effective antibiotics against the common bacteria that cause sinusitis. They are recommended for adults with moderate sinusitis who have already been treated with antibiotics within 6 weeks or who are allergic to beta-lactam antibiotics.

Some of the newer fluoroquinolones only need to be taken once a day, which make compliance easier. Some, but not all, quinolones cause photosensitivity. S. pneumoniae strains resistant to the quinolones have been uncommon in the U.S. but their numbers are increasing. In fact, levofloxacin was the first drug approved specifically for penicillin-resistant S. pneumoniae. Unfortunately, studies are now finding resistance to this drug as well.

Lincosamide

Lincosamides prevent bacteria from reproducing. The most common lincosamide is clindamycin (Cleocin). This antibiotic is useful against many S. pneumoniae bacteria but not against H. influenzae.

Tetracyclines

Tetracyclines inhibit bacterial growth. They include doxycycline, tetracycline, and minocycline. They can be effective against S. pneumoniae and M. catarrhalis, but bacteria that are resistant to penicillin are also often resistant to doxycycline. Tetracyclines have unique side effects among antibiotics, including skin reactions to sunlight, possible burning in the throat, and tooth discoloration.

Ketolides

In February 2007, the FDA withdrew approval of telithromycin (Ketek) for treatment of acute bacterial sinusitis. The agency decided that the serious risks of telithromycin outweigh its benefits for sinusitis treatment. The decision followed several 2006 reports of patient deaths due to severe liver damage. Telithromycin is now approved only for treatment of community-acquired pneumonia (CAP).

In 2003, research suggested that delivering medications directly to the sinus passages (instead of the bloodstream, like a pill might) significantly increases the amount of time chronic sinusitis patients remain infection free. The treatment, called nebulized antibiotic therapy, requires that patients inhale antibiotics in mist form to topically treat their sinusitis. The study showed that nebulization therapy increased the infection free period for some patients by almost 300% when compared to other treatments.

Patients who show signs that infection has spread beyond the nasal sinuses into the bone, brain, or other parts of the skull require emergency care. High dose antibiotics are administered intravenously, and emergency surgery is almost always necessary in such cases.

Severe Fungal Sinusitis. Sinusitis caused by severe fungal infections is a medical emergency. Treatment is aggressive surgery, and high-dose antifungal chemotherapy with a drug such as amphotericin B can be life saving. The use of oxygen administered at high pressure (hyperbaric oxygen) is showing promise as additional therapy for potentially deadly fungal infections.

Treatment for Chronic Sinusitis

Determining and Treating any Underlying Conditions. A thorough diagnostic work-up should be performed to rule out any underlying conditions, including but not limited to allergies, asthma, any immune problems, gastroesophageal reflux disorder, and structural problems in the nasal passages. If a primary trigger for chronic sinusitis can be identified, it should be treated or controlled if possible.

Initial Treatment of Sinusitis. For treatment of chronic sinusitis itself, some doctors recommend:

A wide spectrum antibiotic (one that can eliminate a wide range of bacteria) taken for at least 30 days.
Alternatively, an antibiotic that attacks anaerobic pathogens.
A corticosteroid nasal spray -- some doctors also recommend oral corticosteroids (such as prednisone) for patients who do not respond to nasal corticosteroids or for those patients who have nasal polyps. Prednisone is also used for patients who have allergic fungal sinusitis.
Saline nasal washes.
The expectorant guaifenesin with a decongestant taken by mouth.
Antihistamines.

If the condition dramatically improves between 1 - 2 months, then the antibiotics are stopped. The patient should continue with both the steroid and saline nasal solutions. If there is no improvement after this time, the surgery may be considered. For some people with chronic sinusitis, however, the condition is not curable, and the goal of treatment is to improve the quality of life.

Chronic sinusitis is often the result of damage to the mucous membrane from a past, untreated acute sinus infection. The aerobic and anaerobic bacteria present in chronic sinusitis are often different from those that cause the acute form. The role of antibiotic treatment for chronic sinusitis is controversial. Special types of antibiotics may be used, and treatment may be needed for a longer time.

Intravenous antibiotic therapy may be required for some patients with chronic sinusitis, particularly those with underlying medical disorders that can worsen the condition. They are typically administered 2 weeks before surgery and continued for about month afterward.

Some studies have reported good results in using antibiotics that are sprayed into the nasal passages using a nebulizer. In one study, patients preferred this method to either oral or intravenous treatments.

Benefits of Corticosteroid Nasal Sprays. Nasal-spray corticosteroids, most commonly called steroids, are effective drugs for treating allergic rhinitis. They also are proving to be very important in the treatment of chronic sinusitis and are sometimes used for acute sinusitis. Some studies have reported that, when combined with antibiotics, they speed recovery and improve healing rates of sinusitis compared to antibiotics alone. Nasal spray steroids are proving to be safe and have the following benefits:

They reduce inflammation and mucus production.
They improve night sleep and daytime alertness in patients with perennial allergic rhinitis.
They appear to be beneficial in treating polyps in the nasal passages.

Nasal-Spray Brands. Corticosteroids available in nasal spray form include:

Triamcinolone (Nasacort). Approved for children over age 6.
Mometasone furoate (Nasonex). Approved for use in patients as young as age 3.
Fluticasone (Flonase, Flounce). Approved for children over age 4.
Beclomethasone (Beconase, Vancenase), flunisolide (Nasalide), and budesonide (Rhinocort). Approved for children over age 6.

Side Effects. Corticosteroids are powerful anti-inflammatory drugs. Although oral steroids can have many side effects, the nasal-spray form affects only local areas, and the risk for wide spread side effects is very low unless the drug is used excessively.

Dryness, burning, stinging in the nasal passage
Sneezing
Headaches and nosebleed (these side effects are uncommon but should be reported to your doctor immediately)

Possible Long-Term Complications. Corticosteroids suppress stress hormones, which are known to produce some serious long-term complications in people who take oral steroids. Researchers have found far fewer concerns with nasal administration or inhaled forms, but there may be certain problems.

Effect on growth. The major concern for children is whether nasal steroids, like other forms of steroids, will adversely affect growth. Studies report either only a temporary and slight (about half an inch) early effect on growth or no effect at all.
Effect on eyes. Glaucoma is a known side effect of oral steroids. Some ophthalmologists have observed higher pressure in the eye (a sign of glaucoma) in some patients taking nasal steroid sprays. Studies have found no increased risk for cataracts in young people who have taken intranasal steroids. All the conditions resolve after stopping the steroid, although periodic eye examinations are advised.
Use during pregnancy. Steroids are most likely safe during pregnancy, but pregnant women should discuss all options carefully before taking them.
Nasal passage injury. Steroid sprays may injure the nasal septum (the bony area that separates the nasal passage) if the spray is directed onto it. This complication is very rare.
Lower resistance to infection. People with any infectious disease or injury in the nose should not take these drugs until the disease or wound has been treated and cured. People should avoid steroids if they have not been vaccinated or have had chicken pox or measles.
In some cases, people become insensitive to the effects of corticosteroids and they stop working.

Leukotriene-antagonists are oral drugs that block leukotrienes, powerful immune system factors that are important in causing airway constriction and mucus production in allergy-related asthma. Leukotriene-antagonists include zafirlukast (Accolate), montelukast (Singulair), (Ziflo), and pranlukast (Ultair, Onon). They may also be useful in certain cases of chronic sinusitis, including sinusitis due to polyps, when allergies are the cause, or in some cases when the cause is unknown.

Scientists are investigating whether antifungal drugs may help treat chronic sinusitis. One such drug, Amphotericin B (SinuNase), is currently in Phase III trials for patients who have had sinus surgery but are still experiencing recurrent sinusitis. Results from previous clinical trials have been mixed.

Patients often have various combinations of allergies, sinusitis, and asthma. Treating each condition is important for improving them all. In addition to decongestants, pain relievers, and expectorants, other remedies are available for people who suffer from nonbacterial sinusitis during allergy season.

Anti-Inflammatory Drugs. Nasal spray corticosteroids (commonly called steroids) are important for reducing the inflammatory response in the nasal passages and airways. They are important in the treatment of asthma and are now considered to be the most effective measure for preventing allergy attacks. Leukotriene-antagonists are also useful for sinusitis symptoms.
Antihistamines. Antihistamine tablets relieve sneezing and itching and can prevent nasal congestion before an allergy attack. Many brands are available by prescription and over the counter.
Immunotherapy. Immunotherapy, commonly referred to as "allergy shots," may be considered for patients with severe seasonal allergies that do not respond to treatment. Immunotherapy is the only treatment that affects the cause of allergies. In one year-long study using immunotherapy, over half of young patients participating experienced improvement in overall sinusitis symptoms, and nearly all felt better in general. Immunotherapy also may prevent asthma and the development of new allergies in children. Newer immunotherapeutic approaches using specially designed antibodies and vaccines are also showing promise.
All drug treatments have side effects, some very unpleasant and, in rare cases, serious. Patients may need to try different drugs until they find one that relieves symptoms without producing excessively distressing side effects.

Surgery

Surgery is used to unblock the sinuses when drug therapy is not effective or if there are other complications, such as structural abnormalities or fungal sinusitis.

The simplest surgical approach is the insertion of a drainage tube into the sinuses followed by an infusion of sterile water to flush them out.

In the past few years there has been a major advance in the surgical treatment with a minimally invasive technique called functional endoscopic sinus surgery (FESS). The procedure allows correction of obstructions, including any polyp and ventilation and drainage to aid healing.

Candidates for the Procedure.

FESS may be a good choice for people with chronic sinusitis associated with structural abnormalities. In one study, the best results were seen in people with polyps (but not those associated with ASA triad, the combination of polyps in the nose, asthma, and sensitivity to aspirin).
Several studies are finding it to be safe and effective in children with chronic sinusitis or whose sinuses have not developed. It does not have an adverse effect on facial growth.
Surgery may help patients with HIV who have chronic or recurrent sinusitis.
It may benefit appropriate candidates who have both sinusitis and asthma. One study suggested that lung function may improve afterward in some patients.

Surgery may not be as effective for patients with the ASA triad, fungus infections, or severe chronic sinusitis, although endoscopy is proving to be beneficial even for these conditions with the use of more powerful instruments.

Procedure. The surgery generally proceeds as follows:

Adults require only a local anesthetic for the procedure, though a general anesthetic is needed for children.
Before the procedure, a computed tomography (CT) scan is taken for use by the surgeon in planning the procedure and as a guide to the sinuses during surgery. Some doctors are now using a device called a depth of field image (DOFI) video enhancement screen that displays a holographic 3-D image. It allows the surgeon an excellent view of the sinus cavities and may prove to significantly reduce complications.
A flexible tube, a miniature camera, and a fiberoptic light source are inserted through a single small opening.
Instruments are then used to remove diseased bone or tissue and clear obstructions. For instance, shavers are used to gently remove soft tissue. Bone cutters are sometimes employed to open the floor of the frontal sinus and restore drainage (called the modified Lothrop procedure). Lasers are also being investigated to remove bone, coagulate the passageways, or clear obstructions.

Complications. Serious complications of FESS are very rare, but the following have been reported in a few cases:

Cerebrospinal fluid leak is the most common major complication, but it occurs in only 0.2% of cases and is usually easily repaired during surgery.
Other very rare complications include meningitis, hemorrhage, infection, or vision loss.
Patients can develop infections afterward that are very difficult to treat. Interesting studies are reporting good to excellent results in these patients by spraying antibiotics into the nasal passages using a nebulizer.

Postsurgical Care. Postsurgical care involves the following:

The patient will experience a dull ache around the nose and sinus cavity that can be treated with pain medication.
Following surgery, the patient should flush the sinuses twice daily with a saline or alkaline solution.
Antibiotics may be prescribed for several weeks until postnasal drip has stopped, and corticosteroid sprays and antihistamines may be needed.

Success Rates. It may take several months for the mucous membranes to completely recover, but between 85 - 90% of patients experience good to excellent symptomatic relief after surgery. Children may require a second procedure 2 - 3 weeks after the first surgery to remove crusty matter.

A high-pressure water jet (HPWJ) treatment that flushes diseased mucus that remains after FESS surgery is being investigated for those whose symptoms do not clear. One 2000 study found the procedure an effective therapy that may even be safe for children.

A new type of surgical procedure threads a small balloon through the sinus passages. As the balloon is gently opened, the sinus passages expand and drainage occurs. Some experts think that this procedure is only appropriate for select patients with sinusitis disease in the maxillary (behind cheek bones), frontal (behind the sides of the forehead), and sphenoid (behind the eyes) sinus regions. It may not work for patients with disease in the ethmoid (between the eyes) sinuses, even though this a common sinusitis location.

Endoscopy is now used in most cases of chronic sinusitis, but in severe cases, invasive surgery using conventional scalpel techniques to remove infected areas may be required. This may be the case with acute ethmoid sinusitis in which pus breaks through the sinus and threatens the eye, with very severe frontal sinusitis, with invasive fungal sinusitis, or when cancer is present in the sinuses.

Resources

www.entnet.org -- American Academy of Otolaryngology - Head and Neck Surgery
www.aaaai.org --American Academy of Allergy, Asthma, and Immunology
www.acaai.org --American College of Allergy, Asthma, and Immunology
www.niaid.nih.gov -- National Institute of Allergy and Infectious Disease
www.american-rhinologic.org -- American Rhinologic Society
www.cdc.gov/nip -- National Immunization Program

References

Brown CL, Bolger WE. Safety and feasibility of balloon catheter dilation of paranasal sinus ostia: a preliminary investigation. Ann Otol Rhinol Laryngol. 2006 Apr;115(4):293-9.

Clay KD, Hanson JS, Pope SD, Rissmiller RW, Purdum PP 3rd, Banks PM. Brief communication: severe hepatotoxicity of telithromycin: three case reports and literature review. Ann Intern Med. 2006 Mar 21;144(6):415-20.

Ebbens FA, Scadding GK, Badia L, Hellings PW, Jorissen M, Mullol J, et al. Amphotericin B nasal lavages: not a solution for patients with chronic rhinosinusitis. J Allergy Clin Immunol. 2006 Nov;118(5):1149-56.

Sharp HF, Denman D, Puumala S, Leopold DA. Treatment of acute and chronic rhinosinusitis in the United States, 1999-2002. Arch Otolaryngol Head Neck Surg. 2007 March;133(3):260-265.

Weschta M, Rimek D, Formanek M, Podbielski A, Riechelmann H. Effect of nasal antifungal therapy on nasal cell activation markers in chronic rhinosinusitis. Arch Otolaryngol Head Neck Surg. 2006 Jul;132(7):743-7.

Review Date:
3/23/2007
Reviewed By:
Harvey Simon, MD, Associate Professor of Medicine, Harvard Medical School; Physician, Massachusetts General Hospital.

A.D.A.M. Copyright

adam.com

Food allergy

FitSugar — Wed, 08 Oct 2008 17:34:56 -0700

Overview

Signs and Symptoms
Risk Factors
Diagnosis
Preventive Care
Treatment
Other Considerations
Supporting Research

HEALTH GUIDE REFERENCE FROM A.D.A.M

About two out of five Americans believe that they are allergic to certain foods. However, fewer than 1% of them have true food allergies. A food allergy occurs when the body's immune system reacts to otherwise harmless substances in certain foods. This is different from a food intolerance, which does not involve the immune system. While most food allergies are mild, in some cases they can cause anaphylactic shock, a serious, sometimes life-threatening reaction. Food allergies affect mostly young children. With the exception of peanut allergy, the majority of children outgrow their food sensitivities.

Signs and Symptoms

Many people who think they have food allergies actually have food intolerances. Symptoms of a true food allergy usually involve the skin and intestines and typically begin just after eating and not longer than 2 hours following ingestion of the particular food. Common symptoms include:

Hives, itching, or eczema
Nausea and vomiting, stomach cramps, indigestion, or diarrhea
Swelling of the eyelids, face, lips, tongue, throat, or other parts of the body (called angioedema)
Wheezing, nasal congestion, or trouble breathing
Lightheadedness, dizziness, or fainting

When the symptoms listed above are extreme, they can be life-threatening. Call a medical emergency response unit if you see the following signs of extreme allergic reaction (anaphylactic shock):

Swelling of the throat and difficulty swallowing
Difficulty breathing
Rapid pulse
Dizziness, lightheadedness, or loss of consciousness
Blue color to the skin and nails

Causes

In most cases, allergies occur when an individual who has a genetic sensitivity to certain allergens is exposed to the substance. Foods frequently responsible for food allergies include:

Shellfish, such as shrimp, crab, and lobster
Tree nuts, including walnuts, almonds, and pecans
Peanuts
Fruits, particularly strawberries, but also melons, pineapple, and other tropical fruits
Tomatoes
Fish
Food additives such as dyes, thickeners, and preservatives. Monosodium glutamate (MSG) is a common food allergy in this category.

Foods that may cause intolerance include:

Wheat and other gluten-containing grains
Cows milk and other dairy products
Corn products

Risk Factors

Family history of allergies increases your risk of having allergies, including food allergies. If both parents have food allergies, you have a 75% chance of having one yourself. If one parent has food allergies, you have a 30 - 40% chance. If neither parent has allergies, you have a 10 - 15% chance.

Excessive exposure to a particular food -- for example, in Japan where rice is a staple, rice is a common food allergen. In Scandinavia, the common allergen is codfish, and in India, chickpeas.

Diagnosis

Your health care provider will take a comprehensive history to find out what symptoms you experience after eating and how soon after eating they occur. Your doctor will also want to know how often you have the reaction and what type of medical treatment you received. Even if your symptoms seem clearly related to a specific food, your doctor may still want to do some tests to be sure that you have a true food allergy and to verify the food or foods responsible for your reaction.

The food causing the allergy can sometimes be identified by the following techniques:

Elimination and re-challenging diet (also called elimination and provocation diet). This technique involves eliminating suspected foods from the diet one at a time until the symptoms disappear. If there is still a question about what may be causing the symptoms, then individual foods are reintroduced one at a time to see if an allergic reaction develops. (Note: this would not be done if the allergic reaction is dangerous or life threatening.) This method is not definitive, but may help narrow the list of suspected foods.
Skin testing. A diluted amount of the food allergen is placed under the skin; if allergic, a raised, red skin lesion will appear, generally within 15 - 20 minutes.
Blood tests (RAST and ELISA). These look for antibodies against the particular food allergens.

Preventive Care

Guidelines from reputable health agencies suggest some steps parents can take to reduce their child's chances of having food and other allergies, although there are no guarantees of success. If either or both parents have a personal or family history of allergy [for example, asthma, eczema, hay fever, perennial allergic rhinitis (allergy to animals, dust mites, or molds)] the following is recommend:

Avoid common allergenic foods, in particular peanuts and tree nuts, during pregnancy and while nursing -- peanut protein, as well as components of cow's milk, eggs, and wheat, are secreted into breast milk
Breast-feed exclusively -- give your baby only breast milk for the first 6 months of life using hypoallergenic formulas to supplement breast-feeding if necessary

Note: Not all studies agree on exclusive breast-feeding. The latest and largest study investigating the relationship between breast-feeding and allergies, particularly asthma, suggests that breast-feeding in the early months of life can prevent allergies until your child is 2 years old.

However, breast-feeding may increase the risk of allergies once your child is older than 2 years. Since delaying foods allows the child's gastrointestinal tract to mature, the following strategies may be helpful:

Delay giving your infant solid food until 6 months of age.
Delay giving your child common allergenic foods as follows: dairy until age 1 year; eggs until age 2 years; peanuts, nuts, and fish until 3 years.
If an allergy develops, carefully avoid the offending food.

Treatment

The goals of treatment are to reduce symptoms and avoid future allergic reactions. Once you are aware of the allergy, the best way to avoid a reaction is by not eating that food. Treatment at the time of a reaction varies according to the severity and type of symptoms. Mild symptoms may go away without treatment. Doctors generally recommend over-the-counter or prescription antihistamines to relieve mild itching, swelling, rash, runny nose, or headache. Soothing skin creams may provide some relief of rashes. Severe allergic reactions (anaphylactic shock) can come on suddenly and accelerate quickly; in this case, emergency treatment is needed. In some instances, survival may depend on an injection of epinephrine (adrenaline). Food allergy sufferers routinely learn to self-administer epinephrine, which may save their life. Avoiding the offending food is the best way to prevent future allergic reactions.

Lifestyle

Avoid offending foods. Read of all package ingredients carefully (many foods are processed with peanuts, eggs, or milk products such as whey). Call ahead when eating out. Take your own food with you on trips.

If you have a history of anaphylactic shock, you should keep a preloaded syringe of epinephrine with you. Your doctor will teach you and a close family member how to use it should the need arise. You should wear a medical bracelet or necklace indicating your particular food allergies.

Medications

Antihistamines are recommended for mild itching, swelling, rash, runny nose, or headache. They are available both by prescription and over the counter in many cold, sinus, and allergy remedies. These include diphenhydramine (Benadryl), cetirizine (Zyrtec), clemastine (Tavist), chlorpheniramine (Chlor Trimeton), desloratadine, fexofenadine (Allegra), hydroxyzine (Atarax), and loratadine (Claritin). Possible side effects include drowsiness, irritability, dry mouth, and heart palpitations.

Skin creams can help soothe rashes.

Epinephrine injection is used to prevent anaphylactic shock. If you have a food allergy that causes such a serious reaction, your doctor will have you carry an injectable epinepherine pen and teach you, and those with whom you spend a lot of time, how to use it in an emergency.

Nutrition and Dietary Supplements

Although you should avoid foods that provoke an allergic reaction, you do not need to restrict variety in your diet. Studies show that the vast majority of people are allergic to only one or two foods. However, you should be aware of the families of foods to which you are allergic. For example, if you are allergic to walnuts, you may also be allergic to pecans and almonds. An allergy to shrimp may also indicate an allergy to crab.

Following these nutritional tips may help reduce symptoms:

Eliminate all suspected food allergens, including dairy, wheat (gluten), soy, chocolate, corn, preservatives and food additives. Your health care provider may want to test for food sensitivities.
Eat more antioxidant rich foods (such as green leafy vegetables) and fruits (such as blueberries, pomegranates and cherries).
Avoid refined foods, such as white breads, pastas, and sugar.
Eat fewer red meats and more lean meats, cold-water fish, or beans for protein.
Use healthy cooking oils, such as olive oil or vegetable oil.
Reduce or eliminate trans-fatty acids, found in commercially baked goods such as cookies, crackers, cakes, French fries, onion rings, donuts, processed foods, and margarine.
Avoid coffee and other stimulants, alcohol, and tobacco.
Drink 6 - 8 glasses of filtered water daily.
Exercise moderately at least 30 minutes daily, 5 days a week.

You may address nutritional deficiencies with the following supplements:

A multivitamin daily, containing the antioxidant vitamins A, C, E, the B-complex vitamins, and trace minerals such as magnesium, calcium, zinc, and selenium.
Omega-3 fatty acids, such as fish oil, 1 - 2 capsules or 1 - 3 tablespoonfuls oil, one to three times daily, to help decrease inflammation and help with immunity. Cold-water fish, such as salmon or halibut, are good sources, but are not substitutes for supplementation.
Vitamin C, 500 - 1,000 mg, one to three times daily, as an antioxidant and for immune support.
L-glutamine, 500 - 1,000 mg three times daily, for support of gastrointestinal health and immunity.
Probiotic supplement (containing Lactobacillus acidophilus), 5 - 10 billion CFUs (colony forming units) a day, when needed for maintenance of gastrointestinal and immune health. Some products may require refrigeration -- check labels carefully.
Grapefruit seed extract (Citrus paradisi), 100 mg capsule or 5 - 10 drops (in favorite beverage) three times daily when needed, for antibacterial, antifungal, and antiviral activity, and for immunity.
Resveratrol (from red wine), 50 - 200 mg daily, to help decrease inflammation and for antioxidant effects.
Coenzyme Q10, 100 - 200 mg at bedtime, for antioxidant and immune activity.

Herbs

Herbs are generally available as standardized, dried extracts (pills, capsules, or tablets), teas, or tinctures/liquid extracts (alcohol extraction, unless otherwise noted). Mix liquid extracts with favorite beverage. Dose for teas is 1 - 2 heaping teaspoonfuls/cup water steeped for 10 - 15 minutes (roots need longer).

Green tea (Camelia sinensis) standardized extract, 250 - 500 mg daily, for inflammation, and for antioxidant and immune effects. Use caffeine free products. You may also prepare teas from the leaf of this herb.
Milk thistle (Silybum marianum) seed standardized extract, 80 - 160 mg two to three times daily, for detoxification support.
Bromelain (Ananus comosus) standardized, 40 mg three times daily, for inflammation.
Turmeric (Curcuma longa) standardardized extract, 300 mg three times a day, for inflammation.
Cat's claw (Uncaria tomentosa) standardized extract, 20 mg three times a day, for inflammation.

Acupuncture

The American Academy of Medical Acupuncture endorses the use of acupuncture for allergies such as food allergies. Acupuncture can help restore normal immune function.

Homeopathy

Although very few studies have examined the effectiveness of specific homeopathic therapies, professional homeopaths may consider individualized remedies for the treatment of food allergy based on their knowledge and experience. Before prescribing a remedy, homeopaths take into account a person's constitutional type -- your physical, emotional, and intellectual makeup. An experienced homeopath assesses all of these factors when determining the most appropriate remedy for a particular individual.

Other Considerations

Pregnancy

Women who have a food allergy or a partner with a food allergy may be able to reduce the risk of allergy in their child by avoiding common allergenic foods during pregnancy and nursing.

Prognosis and Complications

Food allergies may cause symptoms ranging from mild abdominal discomfort to life-threatening anaphylaxis. Avoiding offending foods may be easy if the food is uncommon or easily identified. However, successful avoidance of offending foods requires strict reading of all ingredients in a package and detailed inquiries when eating away from home. Children may outgrow food allergies (particularly to milk or soy), but adults are unlikely to lose their allergies.

Supporting Research

Carey CF, Lee HH, Woeltje KF, eds. The Washington Manual of Medical Therapeutics. 29th ed. New York, NY: Lippincott-Raven; 1998:216-217, 223-225.

Chandra RK. Food allergy. Indian J Pediatr. 2002;69(3):251-255.

Friedrich MJ. A bit of culture for children: probiotics may improve health and fight disease. JAMA. 2000;284(11):1365-1366.

Kalliomaki M, Salminen S, Arvilommi H, Kero P, Koskinen P, Isolauri E. Probiotics in primary prevention of atopic disease: a randomized placebo controlled trial. Lancet. 2001;357(9262):1076-1079.

Knight AK, Bahna SL. Diagnosis of food allergy. Pediatr Ann. 2006;35(10):709-14.

Kukkonen K, Savilahti E, Haahtela T, et al. Probiotics and prebiotic galacto-oligosaccharides in the prevention of allergic diseases: a randomized, double-blind, placebo-controlled trial. J Allergy Clin Immunol. 2007;119(1):192-8.

Hill DJ, Roy N, Heine RG, et al. Effect of a low-allergen maternal diet on colic among breastfed infants: a randomized, controlled trial. Pediatrics. 2005;116(5):e709-15.

Host A, Halken S. Primary prevention of food allergy in infants who are at risk. Curr Opin Allergy Clin Immunol. 2005;5(3):255-9.

Hourihane JO. Recent advances in peanut allergy. Curr Opin allergy Clin Immunol. 2002;2(3):227-231.

Noh G, Ahn HS, Cho NY, Lee S, Oh JW. The clinical significance of food specific IgE/IgG4 in food specific atopic dermatitis. Pediatr Allergy Immunol. 2007;18(1):63-70.

Osborn D, Sinn J. Probiotics in infants for prevention of allergic disease and food hypersensitivity. Cochrane Database Syst Rev. 2007;4:CD006475.

Patil SP, Napihadkar PV, Bapat MM. Chickpea: a major food allergen in the Indian subcontinent and its clinical and immunochemical correlation. Ann Allergy Asthma Immunol. 2001;87(2):140-145.

Ring J, Mohrenschlager M. Allergy to peanut oil - clinically relevant? J Eur Acad Dermatol Venereol. 2007 Apr;21(4):452-5.

Sampson HA. Clinical practice. Peanut allergy. N Engl J Med. 2002;346(17):1294-1299.

Sampson HA. Food allergy. JAMA. 1997; 278:1888-1894.

Sears MR, Greene JM, Willan AR, et al. Long-term relation between breastfeeding and development of atopy and asthma in children and young adults: a longitudinal study. Lancet. 2002;360:901-907.

Seppo L, Korpela R, Lonnerdal B, et al. A follow-up study of nutrient intake, nutritional status, and growth in infants with cow milk allergy fed either a soy formula or an extensively hydrolyzed whey formula. Am J Clin Nutr. 2005;82(1):140-5.

Staden U, Rolinck-Werninghaus C, Brewe F, Wahn U, Niggemann B, Beyer K. Specific oral tolerance induction in food allergy in children: efficacy and clinical patterns of reaction. Allergy. 2007;62(11):1261-1269.

Vadas P, Wai Y, Burks W, Perelman B. Detection of peanut allergens in breast milk of lactating women. JAMA. 2001;285(13):1746-1748.

Vlieg-Boerstra BJ, van der Heide S, Bijleveld CM, et al. Placebo reactions in double-blind, placebo-controlled food challenges in children. Allergy. 2007;62(:905-12.

Review Date:
11/30/2007
Reviewed By:
Ernest B. Hawkins, MS, BSPharm, RPh, Health Education Resources; and Steven D. Ehrlich, NMD, private practice specializing in complementary and alternative medicine, Phoenix, AZ. Review provided by VeriMed Healthcare Network.

A.D.A.M. Copyright

adam.com

Allergies

admin — Wed, 03 Sep 2008 17:52:11 -0700

HEALTH GUIDE REFERENCE FROM A.D.A.M

Definition

An allergy is an exaggerated immune response or reaction to substances that are generally not harmful.

Causes, incidence, and risk factors

Allergies are relatively common. Both genetics and environmental factors play a role.

Allergy is caused by an oversensitive immune system, which leads to a misdirected immune response. The immune system normally protects the body against harmful substances, such as bacteria and viruses. It reacts to substances (allergens) that are generally harmless and in most people do not cause a problem.

But in a person with allergies, the immune response is oversensitive. When it recognizes an allergen, it releases chemicals, such as histamines. This causes itching, swelling, mucus production, muscle spasms, hives, rashes, and other symptoms, which vary from person to person.

What part of the body is contacted by the allergen plays a role in the symptoms you develop. For example, allergens that are breathed in often cause a stuffy nose, itchy nose and throat, mucus production, cough, or wheezing. A food allergen can cause nausea, vomiting, abdominal pain, cramping, diarrhea, or a severe, life-threatening reaction. Allergies to plants often cause a skin rash. Drug allergies usually involve the whole body and can lead to a variety of symptoms.

Some medical conditions, such as eczema and asthma, are linked to allergies.

Common allergens include pollen, mold, pet dander, and dust. Food and drug allergies are common. Allergic reactions can also be caused by insect bites, jewelry, cosmetics, and other substances.

Some people have allergy-like reactions to hot or cold temperatures, sunlight, or other physical stimuli. Sometimes, friction (rubbing or vigorously stroking the skin) will cause symptoms.

Symptoms

Allergy symptoms vary, but may include:

Breathing problems
Burning, tearing, or itchy eyes
Conjunctivitis (red, swollen eyes)
Coughing
Diarrhea
Headache
Hives
Itching of the nose, mouth, throat, skin, or any other area
Runny nose
Skin rashes
Stomach cramps
Vomiting
Wheezing

Signs and tests

The health care provider will perform a physical exam and ask questions such as when the allergy occurs.

Allergy testing may be needed to determine if the symptoms are an actual allergy or caused by other problems. For example, eating contaminated food (food poisoning) may cause symptoms similar to food allergies. Some medications (such as aspirin and ampicillin) can produce non-allergic reactions, including rashes.

Skin testing is the most common method of allergy testing. One type of skin testing is the scratch test. It involves placing a small amount of the suspected allergy-causing substances on the skin, and then slightly scratching the area so the substance moves under the skin. The skin is closely watched for signs of a reaction, which include swelling and redness. Skin testing may be an option for some young children and infants.

A blood test called RAST (radioallergosorbent) measures the levels of specific allergy-related substances. The blood test may be used if you cannot have or do not want a skin test.

Other blood tests that may help reveal allergies include:

Antibody/immunoglobulin (particularly IgE) levels
CBC
Complement levels

In some cases, the doctor may tell you to avoid certain items to see if you get better, or to use suspected items to see if you feel worse. This is called "use or elimination testing." This is often used to check for food or medication allergies.

The doctor may also check your reaction to physical triggers by apply heat, cold, or other stimulation to your body and watching for an allergic response.

Sometimes, a suspected allergen is dissolved and dropped into the lower eyelid to check for an allergic reaction. This should only be done by a health care provider.

Treatment

The best way to reduce symptoms is to try and avoid what causes your allergies in the first place. This is especially important for food and drug allergies.

The most appropriate medication depends on the type and severity of symptoms. Specific illnesses that are caused by allergies (such as asthma, hay fever, and eczema) may require other treatments. Medications that can be used to treat allergies include:

ANTIHISTAMINES

Short-acting antihistamines are generally available over-the-counter. They help relieve mild to moderate symptoms but may cause drowsiness. In addition, the short-acting antihistamine diphenhydramine (Benadryl) can affect a child's learning abilities. Loratadine (Claritin) does not tend to cause drowsiness or affect learning in children.
Longer-acting antihistamines require a prescription. They usually do not interfere with learning. Examples of longer-acting antihistamines include fexofenadine (Allegra) and cetirizine (Zyrtec). Overall, they cause less drowsiness than other medicines, but cetirizine may cause drowsiness in some people.

NASAL SPRAYS

Nasal corticosteroid sprays are safe and work very well for persons whose symptoms do not go away with antihistamines alone. These prescription medications include fluticasone (Flonase), mometasone (Nasonex), and triamcinolone (Nasacort AQ).
A newer nasal spray called azelastine (Astelin) is approved for those with seasonal or environmental allergies. It is an antihistamine and not a corticosteroid.
Cromolyn sodium is a nasal spray (NasalCrom) used to treat hay fever symptoms. (Eye drop versions are available for itchy, bloodshot eyes.)
Decongestants can help relieve a stuffy nose. However, nasal spray decongestants should not be used for more than several days, because they can cause a "rebound" effect and make the congestion worse. Decongestants in pill form do not cause this problem.

OTHER MEDICINES

Leukotriene inhibitors are medicines that specifically block the substances that trigger allergies. Montelukast (Singulair) is a prescription medicine approved for those with asthma and indoor and outdoor allergies.
Allergy shots (immunotherapy) are occasionally recommended if the allergen cannot be avoided and symptoms are hard to control. Allergy shots keep your body from over-reacting to the allergen. Regular injections of the allergen are given, with each dose slightly larger than the previous dose until a maximum dose is reached. They do not work for everybody and require frequent doctor's visits.

Severe allergic reactions (anaphylaxis) require a medicine called epinephrine, which can be life saving when immediately given.

Support Groups

See: Asthma and allergy support group

Expectations (prognosis)

Most allergies can be easily treated with medication.

Some children may outgrow an allergy. This is particularly true of food allergies. However, as a general rule, once a substance has triggered an allergic reaction, it continues to affect the person.

Allergy shots are most effective when used to treat those with hay fever symptoms and severe insect sting allergies. They do not work well for food allergies. Allergy shots may require years of treatment, but they work in about two-thirds of cases. However, they may cause uncomfortable side effects (such as hives and rash) and dangerous outcomes (such as anaphylaxis).

Complications

Anaphylaxis (life-threatening allergic reaction)
Breathing problems and discomfort during the allergic reaction
Drowsiness and other side effects of medicines

Calling your health care provider

Call for an appointment with your health care provider if:

Severe symptoms of allergy occur
Treatment for allergies no longer works

Prevention

Children who have been breastfed are less likely to have allergies. In addition, a mother who avoids cow's milk, eggs, nuts, and peanuts while breastfeeding can prevent allergy-related conditions, including eczema, in some children.

If there is a family history of eczema and allergies it is wise to discuss the implications for infant feeding with your child's doctor. The timing of introduction of solid foods in general, as well as of several specific foods, can help prevent some allergies.

There is also evidence that infants exposed to certain airborne allergens (such as dust mites and cat dander) may be less likely to develop related allergies. This is called the "hygiene hypothesis" and sprang from observations that infants on farms tend to have fewer allergies than those who grow up in environments that are more sterile.

Once allergies have developed, treating the allergies and carefully avoiding those things that cause reactions can prevent allergies in the future.

References

Christodoulopoulos P, Tulic MK, Kontolemos M, Hamid Q. Immunopathology of Allergic Airway Inflammation.In: Middleton's Allergy: Principles and Practice. 6th ed. St. Louis, Mo: Mosby; 2003; 501-511.

Goldman L, Ausiello D. Cecil Textbook of Medicine, 22nd ed. Philadelphia, Pa: WB Saunders; 2004:1590-1591.

Review Date: 2/15/2007

Reviewed By: Donald Accetta, MD, MPH, President, Allergy & Asthma Care, PC, Taunton, MA. Review provided by VeriMed Healthcare Network.

A.D.A.M. Copyright

adam.com

Source Doc: 1_000812

How to Prevent Bad Breath

FitSugar — Mon, 17 Aug 2009 10:00:24 -0700

We've all been embarrassed by occasional bouts of bad breath after eating a roasted garlic pizza or a sandwich piled with onions. If you're dealing with bad breath all the time, though, it can be mortifying. So here are some tips to keep your mouth smelling fresh.

Quit cigarettes if you're a smoker.
Get your teeth checked out by your dentist. Cavities and gum disease can cause bad breath.
Brush and floss during the day, every time you eat. When food particles hang out in your mouth, bacteria collects and emits stinky hydrogen sulfur vapors. So keep a toothbrush, toothpaste, and floss in your purse at all times to use after coffee breaks, lunch, and snacks.
Drink more water. It'll help keep the bacteria in your mouth to a minimum.
Don't mask your bad breath with sugary mints. They'll freshen your breath briefly, but the sugar will only cause more stinky plaque to build up. If you can't brush, go for sugarless gum instead since chewing increases saliva production, which is your best weapon against bad breath.

What else can help prevent bad breath? To find out, read more.

If you suffer from allergies or sinus infections, postnasal drip in the back of your throat can cause bad breath. So get your symptoms under control with antibiotics or allergy meds.
Keep in mind, though, that certain medications such as decongestants or allergy pills can cause dry mouth, which can also lead to bad breath. When your mouth is dry, dead cells and bacteria accumulate on your gums, tongue, and teeth. When these cells decompose, they produce a foul smell. Water helps, but if your symptoms are really bothering you try switching medications.
Eat yogurt. Studies have found that one serving of yogurt each day reduces the level of odor-causing hydrogen sulfide in the mouth. Be sure to eat ones with active cultures.
Avoid certain foods such as garlic, onions, and alcohol. Once consumed, these foods get absorbed into your bloodstream, are carried to your lungs, and are given off in your breath.
To help prevent the buildup of plague, which can cause bad breath, eat crunchy fibrous foods such as apples, carrots, and celery.
Bacterium aren't a fan of foods such as citrus fruits, berries, and melon because they make the environment in your mouth too acidic, so get your fill of vitamin C. Another plus for consuming vitamin C is that it also helps prevent gum disease and gingivitis.
Chew herbs such as parsley, coriander, spearmint, tarragon, eucalyptus, rosemary, and cardamom. These all help fight bad breath.
Clean your tongue with a tongue scraper. Use it twice a day to remove bacteria and dead skin cells from your tongue.