Adams Plus Flea and Tick Spot On for Cats is a long-lasting flea and tick treatment specifically formulated for cats. It's a 5 in 1 control treatment for fleas, flea eggs, flea larvae, Deer ticks, mosquitoes. It starts working on contact and controls flea reinfestation for up to 1 month. It breaks the flea life cycle by killing flea eggs before they hatch and flea larvae. This long-lasting and quick drying formula spreads over time with your cat's movement through the skin and hair oils. This is a 3 month supply. Flea prevention has never been easier!