Interceptor Plus is used for the prevention of heartworm disease caused by Dirofilaria immitis, and for the treatment and control of adult roundworm (Toxocara canis, Toxascaris leonina), adult hookworm (Ancylostoma caninum), adult whipworm (Trichuris vulpis) and adult tapeworm (Taenia pisiformis, Dipylidium canium, Echinococcus multilocularis and Echinococcus granulosus) infections in dogs and puppies over 6 weeks in age and weighing over 2 lbs. Prior to administration of Interceptor Plus (milbemycin oxime/praziquantel), dogs should be tested for existing heartworm infections.