Safe-Guard Canine Dewormer Non-prescription formula (same as Panacur) contains 22.2% Fenbendazole controls and removes roundworms, hookworms, whipworms, and Taenia tapeworms. Fenbendazole kills the parasite by disrupting its energy metabolism. Each deworming treatment requires 3 daily doses. Simply mix Safe-Guard Canine Dewormer granules with food. Safe for puppies 6 weeks or older and pregnant dogs. Use: For the treatment and control of: Tapeworm, Roundworms, Hookworms, Whipworms.