Advocate Spot-On Solution (imidacloprid & moxidectin) is used to treat and prevent a broad spectrum of parasites in cats. including fleas, ear mites, and intestinal worms (roundworms and hookworms), and also prevents heartworm disease. Kills both adult fleas and flea larvae, helping to prevent infestation and reduce the incidence of Flea Allergy Dermatitis (FAD). Applied monthly.