You should not use this medicine if you have had an allergic reaction to norfloxacin or to any other fluoroquinolone antibiotic (such as ciprofloxacin, gatifloxacin, levofloxacin, ofloxacin, Cipro®, Floxin®, Levaquin®, or Tequin?). You should not use this medicine if you have ever had a swollen or ruptured tendon after using a fluoroquinolone.
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.
Keep using this medicine for the full treatment time, even if you feel better after the first few doses. Your infection may not clear up if you stop using the medicine too soon.
This medicine should come with a Medication Guide. Read and follow these instructions carefully. Ask your doctor or pharmacist if you have any questions. Ask your pharmacist for the Medication Guide if you do not have one. Your doctor might ask you to sign some forms to show that you understand this information.
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.
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.
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are using a steroid medicine (such as dexamethasone, prednisolone, prednisone, Medrol®, or Decadron®). Using a steroid together with this medicine may increase your chance of having tendon problems.
Make sure your doctor knows if you are also using heart rhythm medicine such as amiodarone (Cordarone®), disopyramide (Norpace®), dofetilide (Tikosyn®), quinidine (Cardioquin®), procainamide (Pronestyl®), or sotalol (Betapace®). Tell your doctor if you are also using cisapride (Propulsid®), clozapine (Clozaril®), cyclosporine (Neoral®, Sandimune®), erythromycin (Ery-tab®), nitrofurantoin (Macrodantin®), probenecid (Benemid®), ropinirole (Requip®), tacrine (Cognex®), theophylline, tizanadine (Zanaflex®), a blood thinner (such as warfarin, Coumadin®), or a diabetes medicine (such as glyburide, Diabeta®, Glucovance®, Glynase®, or Micronase®). Make sure that your doctor knows if you are also using a pain or arthritis medicine (such as ibuprofen, naproxen, Advil®, Aleve®, Celebrex®, or Motrin®), medicine for depression (such as amitriptyline, fluoxetine, nortriptyline, Elavil®, Pamelor®, Prozac®, Sarafem®, or Vivactil®), or medicine to treat mental illness (such as haloperidol, mesoridazine, pimozide, prochlorperazine, quetiapine, thioridazine, ziprasidone, Compazine®, Geodon®, Haldol®, Mellaril®, Orap®, Serentil®, or Seroquel®).
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.
Make sure your doctor knows if you are pregnant or breastfeeding. 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 (such as QT prolongation), or hypokalemia (low blood potassium).
This medicine may cause serious allergic reactions including anaphylaxis, which can be life-threatening and require immediate medical attention. Call your doctor right away if you have itching; hives; hoarseness; shortness of breath; trouble with breathing; trouble with swallowing; or any swelling of your hands, face, or mouth after you receive this medicine.
Your tendons may be more easily injured while you are using this medicine. Stop using this medicine and call your doctor if you have pain or swelling in your knee, ankle, shoulder, elbow, hand, or wrist. You may also need to avoid exercise or certain physical activities. Children and elderly patients (over 60 years of age) are more likely to have tendon problems. This risk of tendon problems may also increase if you have rheumatoid arthritis, if you are taking steroid medicines (corticosteroids), or if you have received an organ (such as heart, kidney, or lung) transplant.
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.
If your symptoms do not improve or if they get worse, call your doctor.
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.