For treatment of pinworm infections, the medication is usually given as a single dose. If necessary, a second treatment may be given in a few weeks. For other types of common worm infections (such as roundworm, hookworm), take mebendazole by mouth as directed by your doctor, usually twice a day (in the morning and in the evening) for 3 days. If necessary, a second treatment may be given in a few weeks. For other types of infections, follow your doctor’s directions. Your doctor may order you to take this medication more often than twice a day and for longer than 3 days.
It is very important to continue taking this medication exactly as prescribed by your doctor. Do not skip any doses. Keep taking this medication until the full prescribed amount is finished, even if symptoms disappear. Stopping the medication too early may result in a return of the infection.