Drontal is a prescription dewormer for cats, effective against tapeworms, hookworms, and roundworms. This dewormer may be used in puppies over three weeks of age, as long as they are over 2 lbs. Drontal is a broad spectrum combination of praziquantel and pyrantel pamoate.Drontal is sold per tablet.,Drontal is a prescription dewormer for cats, effective against tapeworms, hookworms, and roundworm