Read the Medication Guide provided by your pharmacist before you start taking norfloxacin and each time you get a refill. If you have any questions, consult your doctor or pharmacist.
Take this medication by mouth, usually twice a day, at least 1 hour before or 2 hours after a meal or dairy products (e.g., milk, yogurt). Take with a full glass of water (8 ounces or 240 milliliters). The dosage is based on your medical condition and response to treatment. Drink plenty of fluids while taking this medication unless your doctor tells you otherwise.
Take this medication at least 2 hours before or 2 hours after taking any drugs that contain magnesium, aluminum, or calcium. Some examples include quinapril, certain forms of didanosine (chewable/dispersible buffered tablets or pediatric oral solution), vitamins/minerals, and antacids. Follow the same instructions if you take calcium-enriched juice, bismuth subsalicylate, sucralfate, iron, and zinc. These medications/products bind with norfloxacin and prevent its full absorption.
Antibiotics work best when the amount of medicine in your body is kept at a constant level. It is important not to miss a dose. To help you remember, take this medication at the same times every day.
Continue to take this medication until the full prescribed amount is finished, even if symptoms disappear after a few days. Stopping the medication too early may allow bacteria to continue to grow, which may result in a return of the infection.
Tell your doctor if your condition persists or worsens.