Noroxin (norfloxacin) is a quinolone antibiotic. It works by killing bacteria or preventing their growth. Noroxin is used to treat bacterial infections of the urinary tract. It will not work for viral infections (such as common cold, flu).

Noroxin is also used to treat gonorrhea. It may also be used for other purposes as determined by your doctor.

Important information

You should not use Noroxin if you are allergic to norfloxacin, or if you have a history of myasthenia gravis.

To make sure you can safely take Noroxin, tell your doctor if you have any of these other conditions:

  • liver disease;
  • kidney disease;
  • diabetes;
  • a history of intestinal problems, such as colitis;
  • seizures;
  • a history of head injury or brain tumor;
  • a history of stroke or blood clot;
  • long QT syndrome (in you or a family member);
  • a personal or family history of prolongation of the QT interval on an electrocardiogram (ECG); or
  • if you are taking an oral diabetes medicine, such as glipizide (Glucotrol), glyburide (DiaBeta, Micronase, Glynase), or tolbutamide (Orinase).

FDA pregnancy category C. Noroxin may be harmful to an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant during treatment.

Norfloxacin can pass into breast milk and may harm a nursing baby. Do not take this medication without telling your doctor if you are breast-feeding a baby.

Older adults may be more likely to have side effects from this medicine.

How should I take Noroxin?

Take Noroxin exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.

Noroxin is usually taken every 12 hours. Follow your doctor's instructions.

You may take Noroxin with or without food. Shake the oral suspension (liquid) well just before you measure a dose. Measure liquid medicine with a special dose-measuring spoon or cup, not a regular table spoon. If you do not have a dose-measuring device, ask your pharmacist for one.

To treat gonorrhea, you will receive a single dose of Noroxin. This medicine is usually given as a shot at your doctor's office, hospital, or clinic.

Take this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Noroxin will not treat a viral infection such as the common cold or flu.

Side effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • severe dizziness, fainting, fast or pounding heartbeats;
  • sudden pain, snapping or popping sound, bruising, swelling, tenderness, stiffness, or loss of movement in any of your joints;
  • muscle weakness, twitching (tetany), or paralysis (total body paralysis);
  • seizure (convulsions);
  • tremors, shaking (parkinsonism);
  • numbness or tingling;
  • a light-headed feeling, like you might pass out;
  • upper stomach pain (that may spread to your back), nausea or vomiting, fast heart rate;
  • jaundice (yellowing of your skin or eyes);
  • pale skin, easy bruising or bleeding;
  • fever, chills, body aches, flu symptoms, sores in your mouth and throat;
  • cough, wheezing, chest pain, trouble breathing; or
  • little or no urinating.

Less serious Noroxin side effects may include:

  • nausea, diarrhea, upset stomach;
  • mild skin rash or itching;
  • tired feeling; or
  • vaginal itching or discharge.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

See also:

Last reviewed by a eMedTV Web Editor on April 18, 2014

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