Active ingredients: Selamectin. Usage: Prevents heartworm disease in cats and dogs. Kills fleas on cats and dogs and prevents flea eggs from hatching. Treats and controls ear mites in cats and dogs. Treats roundworms and hookworms infections in cats. Treats and controls sarcoptic mites on dogs. Treats and controls brown ticks on dogs. (Script required.) The recommended minimum dose is 2.7 mg selamectin per pound (6 mg/kg) of body weight. Administer the entire contents of a single dose tube of Revolution topically in accordance with package instructions.