Fenbendazole is a broad spectrum benzimidazole anthelmintic used against gastrointestinal parasites including roundworms, hookworms, whipworms, the taenia species of tapeworms, pinworms, aelurostrongylus, paragonimiasis, strongylesand strongyloides。

Fenbendazole is regarded as a safe anthelmintic drug at recommended therapeutic doses when administered in sheep, cattle, horses, fish, dogs, cats, rabbits and seals.