Contains Fipronil – the active ingredient used in Frontline Top Spot® for cats*. FiproGuard™ topical flea and tick squeeze-on for cats provides three-way protection that kills fleas, ticks, and chewing lice. It kills deer ticks that may transmit Lyme disease as well as brown dog ticks, American dog ticks and lone star ticks. Can be used on breeding, pregnant, and lactating cats. Fast-acting and long-lasting, sustained-release formula protects cats for up to 30 days. *FIPROGUARD™ is a trademark of Sergeant's Pet Care Products, Inc. Frontline Top Spot® is a registered trademark of Merial. Frontline Top Spot® and Merial are not affiliated with Sergeant's Pet Care Products, Inc.