FRONTLINE Plus Flea & Tick Treatment for Cats provides fast-acting, waterproof, and long-lasting protection. Each monthly dose kills fleas, flea eggs, flea larvae, chewing lice, and ticks that may transmit Lyme disease. Specially formulated with fipronil and (S)-methoprene, this trusted formula breaks the flea life cycle and prevents future infestations. Safe for kittens and cats over 1.5 lbs. and 8 weeks of age, FRONTLINE Plus has been trusted by pet parents for over 20 years. Each pack includes 6 easy-to-apply treatments, giving your cat up to 6 months of complete protection. Even indoor cats need flea and tick protection, as fleas can be carried inside on clothing or other pets. Protect your pets and home with monthly applications. FRONTLINE Plus also comes in a formula for dogs, making it easy to safeguard all pets in the household.