Take this medication by mouth with or without food as directed by your doctor, usually twice a day (morning and evening) for 3 days. Swallow the tablets whole with a glass of liquid (6 to 8 ounces/180 to 240 milliliters). Do not take this medication with alcohol. Do not crush, break, or chew the tablets. Doing so can release all of the drug at once, increasing the risk of side effects. The dosage is based on your medical condition and response to treatment.

For the best effect, take this antibiotic at evenly spaced times. 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 result in a return of the infection.

Tell your doctor if you develop a fever or bloody diarrhea, or if your condition does not get better, or if it gets worse after 2 days.