Generic name: Norfloxacin.

Noroxin is a fluoroquinolone antibiotic. It inhibits the growth of bacteria. 

Quick Facts About Noroxin


Used to treat infections of the urinary tract, including cystitis; certain sexually transmitted diseases such as gonorrhea; and prostatis.

Noroxin Dosage

Take with a glass of water 1 hour before or 2 hours after eating a meal; should drink lots of water during Noroxin therapy. Do not increase dosage unless specifically directed by your doctor. Finish prescription; otherwise infection may reappear.

  • Usual adult dose: for uncomplicated urinary tract infections — 800 milligrams per day total, taken as 400 milligrams 2 times per day, for 3 to 10 days, depending on type of infection. For complicated urinary tract infections — 800 milligrams total, taken as 400 milligrams 2 times per day, for 10 to 21 days. For sexually transmitted diseases — one single dose of 800 milligrams for 1 day. For prostatitis — 800 milligrams per day total, taken as 400 milligrams every 12 hours for 28 days.
  • Usual child dose: not generally prescribed for children under 18 years.
  • Missed dose: take as soon as possible, unless almost time for next dose. If so, skip missed dose; go back to regular schedule. Do not double doses.

Noroxin Side Effects

Overdose symptoms:

no specific information available. However, if you suspect an overdose, immediately seek medical attention.

More common side effects: dizziness, fatigue, headache, nausea.

Less common Noroxin side effects: abdominal cramping; arthritis; back pain; bitter taste; blood abnormalities; confusion; constipation; convulsions; dead skin; depression; diarrhea; dizziness; dry mouth; double vision; extreme sleepiness; fever; flushing or reddish skin; gas; hallucinations; headache; heartburn; hives; indigestion; insomnia; itching; joint pain; kidney failure (symptoms — reduced amount of urine, drowsiness, nausea, vomiting, and coma); lack of coordination; light-headedness; loss of appetite; low blood sugar; muscle pain; nausea; peeling skin; psychotic reactions; rash on skin and mucous membranes; reduced blood platelets causing bleeding disorders; restlessness; severe blisters and bleeding in genitals and in mucous membranes of eyes, lips, mouth, and nasal passages; severe skin reaction to sun; shock; shortness of breath; stomach pain; sweating; temporary hearing loss; tingling or pins and needles; vomiting; weakness; yellow eyes and skin.


Inform your doctor before combining Noroxin with:

calcium supplements, cyclosporine (Sandimmune), multivitamins and other products containing iron or zinc, nitrofurantoin (Macrodantin or Macrobid), oral anticoagulants such as warfarin (Coumadin), probenecid (Benemid), sucralfate (Carafate), theophylline (Theo-Dur).

Check with your doctor before using: antacids such as Maalox and Turns, and caffeine during Noroxin therapy.

Special Cautions

If pregnant or planning to become pregnant, inform your doctor immediately. Do not take while nursing an infant

No special precautions apply to seniors.

Not generally prescribed for children.

  • On occasion, severe or fatal reactions have been experienced after the first dose with medications similar to Noroxin. Reactions may include: confusion, convulsions, difficulty breathing hallucinations, heart collapse, hives, increased pressure in the head, itching, light-headedness, loss of consciousness, psychosis, rash, restlessness, shock, swelling in face or throat, tingling, tremors. If you experience any of these symptoms, stop taking Noroxin and immediately seek medical help.
  • May cause dizziness and impair your ability to drive a car or operate machinery. Do not take part in any activity that requires alertness.
  • Not prescribed for syphilis. If prescribed for gonorrhea, may mask syphilis symptoms; doctor may test for syphilis at the same time you are diagnosed with gonorrhea, and after Noroxin therapy.
  • Should not take if you have: epilepsy, severe cerebral arteriosclerosis, and other conditions causing seizures.
  • Avoid excessive exposure to sunlight. If you have a severe reaction to sunlight, immediately discontinue Noroxin and call your doctor.

Note: provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Noroxin side effects, please contact your healthcare provider