Quad Dewormer Chewable Tablets for Dogs is a broad-spectrum antihelminthic that removes the four most common types of parasitic worms in dogs, including tapeworms (Dipylidium caninum and Taenia pisiformis), hookworms (Ancylostoma caninum and Uncinaria stenocephala), roundworms (Toxocara canis and Toxascaris leonina), and whipworms (Trichuris vulpisin).