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Noroxin Oral

  • persistent diarrhea
  • abdominal or stomach pain/cramping
  • blood/mucus in your stool


Use of this medication for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection. Contact your doctor if you notice white patches in your mouth, a change in vaginal discharge, or other new symptoms.

A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any of the following symptoms of a serious allergic reaction:

  • rash
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing


This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Noroxin Oral Precautions

Before taking norfloxacin, tell your doctor or pharmacist if you are allergic to it; or to other quinolone antibiotics such as ciprofloxacin, gemifloxacin, levofloxacin, moxifloxacin, or ofloxacin; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of:

  • certain metabolic disorder (G6PD deficiency)
  • diabetes
  • heart problems (e.g., recent heart attack)
  • joint/tendon problems (e.g., tendonitis, bursitis)
  • kidney disease
  • certain muscle problem (myasthenia gravis)
  • nervous system disorder (e.g., peripheral neuropathy)
  • seizure disorder
  • conditions that increase your risk of seizures (e.g., brain/head injury, brain tumors, cerebral atherosclerosis)


Norfloxacin may cause a condition that affects the heart rhythm (QT prolongation). QT prolongation can infrequently result in serious (rarely fatal) fast/irregular heartbeat and other symptoms (such as severe dizziness, fainting) that require immediate medical attention. The risk of QT prolongation may be increased if you have certain medical conditions or are taking other drugs that may affect the heart rhythm (see also Drug Interactions section). Before using norfloxacin, tell your doctor or pharmacist if you have any of the following conditions:

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