What Worms Does Fenbendazole Treat? Fenbendazole is a broad-spectrum anthelmintic medication widely used in veterinary medicine to treat and control a variety of parasitic worm infections. It belongs to the benzimidazole class of drugs and is valued for its effectiveness, safety profile, and versatility across multiple animal species. Fenbendazole works by disrupting the parasite’s ability to absorb nutrients, ultimately...