Fenbendazole + Praziquantel Tablets are a broad-spectrum dewormer drug used to treat or control gastrointestinal roundworms and tapeworms. It is typically used to treat dogs and cats, but may be used for other animals. This combination is an effective treatment for a wide range of parasites.Fenbendazole + Praziquantel Tablets are a broad-spectrum dewormer drug used to treat or control gastrointestinal roundworms and tapeworms. It is typically used to treat dogs and cats, but may be used for other animals. This combination is an effective treatment for a wide range of parasites.