Midamox for Cats Prescription items are NON-RETURNABLE and NON REFUNDABLE Meet Midamox (imidacloprid + moxidectin) topical solution from Norbrook, an affordable alternative to Advantage Multi. Made with the only combination of active ingredients approved by the FDA to kill circulating heartworm microfilariae in dogs, Midamox is an effective, affordable choice for protecting pets against heartworm disease, treating flea infestations, and treating and controlling several other parasites. Features: Protects against flea infestations and treatment of several other parasites Protects against heartworm disease Prevents roundworms and hookworms Helps prevent ear mites Dosage- Small/Medium: 5.1-9lbs Large: 9.1-18lbs Avoid oral ingestion. Cats: WARNING: Do not use on sick, debilitated or underweight cats. (See Contraindications and Adverse Reactions for more information.) Do not use in cats less than 9 weeks of age.