Antiparasitics are used to treat conditions like head lice, rosacea, and river blindness (onchocerciasis). They also have other uses, such as treating Chagas disease and certain types of parasitic gut infections. These medications work by either killing the parasites or stopping their growth. Antiparasitics come in different forms, including oral pills and topical creams. Examples include ivermectin (Soolantra, Stromectol, Sklice), mebendazole (Emverm), and benznidazole.