Read the Medication Guide provided by your pharmacist before you start taking ketoconazole and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

Take this medication by mouth as directed by your doctor, usually once a day. This medication may be taken with or without food, but taking it with food helps to reduce stomach upset.

If you are taking an antacid, take ketoconazole at least 2 hours before or 1 hour after taking the antacid, otherwise ketoconazole may not be absorbed into the body. See also Drug Interactions for more information.

The dosage and length of treatment is based on your medical condition, response to treatment, and other medications you may be taking. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). Children's dosage is also based on weight. It may take from several days to several months to complete treatment.

This medication works best when the amount of medicine in your body is kept at a constant level. Take this drug at evenly spaced intervals. To help you remember, take it at the same time each 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 your condition lasts or gets worse.