REVOLUTION (selamectin) is the safe, simple way to protect dogs from heartworms, fleas and other harmful parasites. Kills adult fleas and prevents flea eggs from hatching for one full month. Prevents and controls flea infestations. Prevents heartworm disease caused by Dirofilaria immitis. Treats and controls ear mite infections. Treats and controls sarcoptic mange (Sarcoptes scabiei). Controls tick infestations due to Dermacentor variabilis.