PetArmor Flea & Tick Squeeze-On Treatment for Cats & Kittens contains the number one vet recommended active ingredient, fipronil, to work effectively at killing adult fleas, ticks and chewing lice. This treatment is available in an easy-to-use, fast-acting topical application specifically formulated for cats and kittens over 1.5 lbs, so each monthly dose will give your cat the same protection. Long-lasting and waterproof, Flea & Tick Squeeze-On Treatment can stop infestations and help prevent them from recurring.