(Bayer) Advantage Multi for Cats is a monthly topical solution to control fleas, heartworms, ear mites, hookworms and roundworms. Advantage Multi for Cats kills adult fleas, prevents heartworm disease, and is indicated for the treatment of flea infestations, for treatment and control of ear mite infestations, and for treatment and control of hookworms and roundworms. Advantage Multi for Cats contains imidacloprid and moxidectin. Apply topically once per month. Approved for cats and kittens at least 2 lbs and 9 weeks of age. Imidacloprid and moxidectin.