6-Month supply, for cats 5 lbs. and over. Bio Spot Spot On Flea & Tick Control for cats and kittens kills fleas, flea eggs and deer ticks for up to one month. In addition, Spot On kills and repels mosquitoes that may carry heartworm disease. Features a natural coat conditioner. 6 month supply for cats 5 lbs. and over. flea tick medications cat pet