Elanco Interceptor spectrum monthly worming tasty 3 chews for large dog will prevent heartworm (Dirofilaria immitis) infection. It will also control adult roundworm (Toxocara canis, Toxascaris leonina), immature roundworm (Toxocara canis), adult whipworm (Trichuris vulpis), adult hookworm (Ancylostoma caninum, Ancylostoma braziliense), adult tapeworm (Echinococcus granulosus, Taenia piriformis, Dipylidium caninum), and aid in the control of adult hookworm (Uncinaria stenocephala) infection, in dogs. Interceptor spectrum must be given every month, preferably on the same date each month, to ensure complete protection for your dog. Beef Flavoured, dogs love the taste. One chew protects your dog for one month. Includes 3 chews. For Large Dogs 22 To 45 kg (Blue pack).