Mebendazole is an anthelmintic medication primarily used to treat infections caused by parasitic worms, including pinworms, roundworms, whipworms, and hookworms. It works by preventing the worms from absorbing sugars necessary for their survival, leading to their expulsion from the body. Mebendazole is commonly prescribed for both adults and children to treat intestinal worm infections and is often used as a single dose.