Fenbendazole (also known as Fenben) is a broad-spectrum benzimidazole anthelmintic used against gastrointestinal parasites including giardia, roundworms, hookworms, whipworms, the tapeworm genus Taenia (but not effective against Dipylidium caninum, a common dog tapeworm). https://okdermo.com/product/wormentel-fenbendazole-tablets/