Generic Name: Norfloxacin

  • What is this medication and its most common uses?

    Noroxin is an antibiotic used to treat certain bacterial infections, including prostate, urinary tract, or certain sexually transmitted diseases.

  • What should I know when beginning and continuing on this medication?

    How does this medication work?

    Noroxin works by stopping the growth of bacteria, thereby treating your infection.

    What are the beneficial effects of this medication and when should I begin to have results?

    What: Noroxin has been shown to be effective against many different types of bacteria.

    When: Everyone responds differently to treatment, so try to be patient and follow your healthcare provider's directions. It is important that you take Noroxin exactly as your healthcare provider has prescribed for the full course of treatment, even if your symptoms improve earlier.

    How do I know it is working?

    You may start to notice an improvement in your symptoms. This is a good indicator that your medication is working. Your healthcare provider may ask you questions and order tests to assess how well your infection is being treated.

  • What are the possible side effects of this medication?

    The following is not a full list of side effects. Side effects cannot be anticipated. If any develop or change in intensity, tell your healthcare provider as soon as possible. Only your healthcare provider can determine if it is safe for you to continue taking this medication.

    Noroxin can cause tendon (tough cords of tissue that connects muscles to bones) problems (such as rupture or swelling). Some tendon problems include pain, swelling, tears, and inflammation of tendons including the back of the ankle (Achilles), shoulder, hand, or other tendon sites. Your risk of tendon problems while taking Noroxin is higher if you are over 60 years of age; are taking corticosteroids (such as prednisone); or have had a kidney, heart, or lung transplant. Call your healthcare provider right away at the first sign of tendon pain, swelling, or inflammation. Also, get medical help right away if you hear or feel a snap or pop in a tendon area, bruise right after an injury in a tendon area, or are unable to move the affected area or bear weight.

    Noroxin can cause worsening of myasthenia gravis (a disease characterized by long-lasting fatigue and muscle weakness) symptoms. Call your healthcare provider right away if you develop worsening muscle weakness or breathing problems.

    More common side effects may include: dizziness, nausea, headache, stomach cramps.

    Less common side effects may include:

    Serious allergic reactions, with symptoms such as hives; rash; trouble breathing or swallowing; swelling of the face, lips, tongue, or throat; rapid heartbeat; fainting; or skin rash accompanied by fever and feeling unwell.

    Liver damage, with symptoms such dark colored urine, or yellowing of your skin or whites of your eyes.

    Changes in sensation and possible nerve damage in your arms, hands, legs, or feet, with symptoms such as pain, burning, tingling, numbness, or weakness in any of these areas of your body.

    Changes in the electrical activity of your heart, with symptoms such as fast or slow heartbeat, or fainting.

    Watery and bloody stools (with or without stomach cramps and fever), even as late as two or more months after having taken the last dose of Noroxin.

  • Who should not take this medication?

    Do not take Noroxin if you are allergic to it, any of its ingredients, or to similar antibiotics (such as ciprofloxacin or moxifloxacin).

    Do not take Noroxin to treat viral infections (such as the common cold).

  • What should I tell my healthcare provider before I take the first dose of this medication?

    Tell your healthcare provider about all prescription, over-the-counter, and herbal medications you are taking before beginning treatment with Noroxin. Also, talk to your healthcare provider about your complete medical history, especially if you have tendon, nerve, bone, kidney, or liver problems; myasthenia gravis; seizures; joint problems; low blood potassium levels; diabetes or problems with low blood sugar; or if you or anyone in your family has an irregular heartbeat, especially prolonged QT interval (very fast or abnormal heartbeats).

  • What is the usual dosage?

    The information below is based on the dosage guidelines your healthcare provider uses. Depending on your condition and medical history, your healthcare provider may prescribe a different regimen. Do not change the dosage or stop taking your medication without your healthcare provider's approval.

    Urinary Tract and Prostate Infections

    Adults: The usual dose is 400 milligrams (mg) every 12 hours. Your healthcare provider will determine the duration of treatment based on the type of your infection.


    Adults: The usual dose is a single dose of 800 mg for one day.

    If you have kidney impairment, your healthcare provider will adjust your dose accordingly.

  • How should I take this medication?

    Take Noroxin exactly as prescribed by your healthcare provider. Do not change your dose or stop taking Noroxin without first talking to your healthcare provider.

    Take Noroxin with or without food, at about the same time each day.

    Take Noroxin at least one hour before or at least two hours after having a meal or milk and/or other dairy products. Drink plenty of fluids while you are taking Noroxin.

    Take Noroxin for the entire length of time prescribed by your healthcare provider. Your symptoms may get better before the infection is completely treated.

  • What should I avoid while taking this medication?

    Do not drive, operate machinery, or engage in other activities that require mental alertness or coordination until you know how Noroxin affects you.

    Do not expose yourself to sunlamps or tanning beds, and try to limit your time in the sun, as Noroxin can increase your sensitivity to light. If you need to be outdoors, use sunscreen and wear a hat and loose-fitting clothes that protect your skin from the sun.

    Do not skip doses. Skipping doses or not completing the full course of Noroxin can decrease its effectiveness and can lead to the growth of bacteria that are resistant to the effects of Noroxin.

  • What are the possible food and drug interactions associated with this medication?

    If Noroxin is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your healthcare provider before combining Noroxin with any of the following: antacids containing aluminum or magnesium, antidepressants, nonsteroidal anti-inflammatory drugs (NSAIDs) (such as ibuprofen), blood thinners (such as warfarin), caffeine, cisapride, clozapine, corticosteroids, cyclosporine, didanosine, diuretics (water pills), erythromycin, heart rhythm medications (such as amiodarone, procainamide, quinidine, or sotalol), insulin or oral diabetes medications (such as glyburide), nitrofurantoin, probenecid, ropinirole, sucralfate, tacrine, theophylline, tizanidine, or multivitamins or other products containing iron or zinc.

  • May I receive this medication if I am pregnant or breastfeeding?

    The effects of Noroxin during pregnancy and breastfeeding are unknown. Tell your healthcare provider immediately if you are pregnant, plan to become pregnant, or are breastfeeding.

  • What should I do if I miss a dose of this medication?

    If you miss a dose of Noroxin, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the one you missed and return to your regular dosing schedule. Do not take two doses at once.

  • How should I store this medication?

    Store at room temperature.

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