How Fenbendazole Works to Eliminate Parasites Fenbendazole is a broad-spectrum anthelmintic agent widely used to treat and control various parasitic infections in both animals and, in some cases, humans. It is especially effective against gastrointestinal parasites such as roundworms, hookworms, whipworms, and certain tapeworms. The medication works by targeting the parasites’ cellular structure, specifically inhibiting the formation...