Parbendazole is primarily used as an anthelmintic agent, effectively treating parasitic worm infections in livestock, particularly in sheep and cattle. It works by disrupting the energy metabolism of the parasites, leading to their immobilization and eventual death. This chemical is especially effective against gastrointestinal nematodes, helping to improve the health and productivity of animals. Additionally, Parbendazole has been explored in research settings for its potential anti-cancer properties, as it may inhibit the growth of certain tumor cells by interfering with microtubule formation. However, its use in humans remains limited and is primarily confined to veterinary medicine.