Treats infections that are caused by bacteria. This medicine is a fluoroquinolone (floor-oh-KWIN-oh-lone) antibiotic.
There may be other brand names for this medicine.
When This Medicine Should Not Be Used
You should not use this medicine if you have had an allergic reaction to norfloxacin or to another fluoroquinolone. Examples of other fluoroquinolones include ciprofloxacin (Cipro®), gatifloxacin (Tequin?), levofloxacin (Levaquin®), and ofloxacin (Floxin®). You should not use this medicine if you have ever had a ruptured tendon after using a fluoroquinolone.
How to Use This Medicine
- Your doctor will tell you how much of this medicine to use and how often. Do not use more medicine or use it more often than your doctor tells you to.
- Take this medicine at least 1 hour before or 2 hours after you eat a meal or use dairy products such as milk, cheese, cream, or yogurt. Take the medicine only with water. Do not take it with milk or with any juice that has calcium added to it.
- Drink extra fluids so you will pass more urine while you are using this medicine. This will keep your kidneys working well and help prevent kidney problems.
If a dose is missed:
- If you miss a dose or forget to use your medicine, use it as soon as you can. If it is almost time for your next dose, wait until then to use the medicine and skip the missed dose. Do not use extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
- Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any leftover medicine after you have finished your treatment. You will also need to throw away old medicine after the expiration date has passed.
- Keep all medicine away from children and never share your medicine with anyone.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- There are many other drugs that can interact with norfloxacin. Make sure your doctor knows about all other medicines you are using.
- Make sure your doctor knows if you are also using heart rhythm medicine such as amiodarone (Cordarone®), disopyramide (Norpace®), dofetilide (Tikosyn®), quinidine (Cardioquin®), or sotalol (Betapace®). Tell your doctor if you are also using cyclosporine (Neoral®, Sandimune®), nitrofurantoin (Macrodantin®), probenecid (Benemid®), theophylline, or a blood thinner such as warfarin (Coumadin®). Your doctor should know if you are also using diabetes medicine such as glyburide, Diabeta®, Glynase®, or Micronase®.
- Some medicines, antacids, and mineral supplements can change with the way norfloxacin works in your body. These medicines include Maalox® or Mylanta®, sucralfate (Carafate®), and multivitamins with calcium, iron, or zinc. Didanosine (Videx®) powder or chewable buffered tablets may also affect how norfloxacin works. If you use any of these medicines, take them at least 2 hours before or 2 hours after you take norfloxacin.
- Avoid caffeine (coffee, soda, chocolate) while you are using this medicine. Norfloxacin may cause caffeine to stay in your body longer than usual.
Warnings While Using This Medicine
- Make sure your doctor knows if you are pregnant or breast feeding. Tell your doctor if you have diabetes, kidney disease, liver disease, myasthenia gravis, or G6PD deficiency. Your doctor should also know if you have a history of seizures, epilepsy, head injury, or stroke. Tell your doctor if you have a history of heart disease, heart rhythm problems, or hypokalemia (low blood potassium).
- Your tendons may be more easily injured while you are using this medicine. This risk of tendon injury may be greater in children. Call your doctor if you have pain or swelling in your knee, ankle, shoulder, elbow, hand, or wrist. You may need to stop using this medicine.
- This medicine may make your skin more sensitive to sunlight. Use a sunscreen when you are outdoors. Avoid sunlamps and tanning beds.
- If you have severe diarrhea, ask your doctor before taking any medicine to stop the diarrhea.
- This medicine may make you dizzy or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.
- Your doctor will need to check your blood or urine at regular visits while you are using this medicine. Be sure to keep all appointments.
- Use this medicine only to treat the infection your doctor has prescribed it for. Do not use this medicine for any infection that has not been checked by a doctor.
Possible Side Effects While Using This Medicine
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing.
- Blistering, peeling, red skin rash.
- Chest pain.
- Diarrhea that may contain blood.
- Fast, pounding, or irregular heartbeat.
- Fever, chills, cough, sore throat, and body aches.
- Numbness, tingling, weakness, or burning pain in your hands, arms, legs, or feet.
- Unusual bleeding, bruising, or weakness.
- Yellowing of your skin or the whites of your eyes.
If you notice these less serious side effects, talk with your doctor:
- Mild skin rash or itching.
- Heartburn, nausea, vomiting, stomach pain, constipation, loss of appetite.
- Sores or white patches in your mouth or throat.
- Trouble sleeping.
- Vaginal itching or discharge.