Fenbendazole is an anthelmintic used to treat common helminth infections, including ascarids, hookworms, whipworms, and a single species of tapeworm, Taenia pisiformis. Giardia spp. are also considered susceptible to fenbendazole.Fenbendazole is an orally active benzimidazole anthelmintic agent, with a broad antiparasitic range. Fenbendazole is a microtubule destabilizing agent and acts on helminthes primarily by binding to tubulin and disrupting the tubulin microtubule equilibrium.