3 Doses Kills Fleas, Flea Eggs & Larvae and Chewing Lice Fast Acting Long-Lasting Waterproof Use Only on Dogs and Puppies weighing 45-88 lbs and 8 weeks or older Kills all stages of ticks, including those that may transmit Lyme disease. Aids in control of sarcoptic mange mite infestations. Contains the same ingredients Fipronil and 9s)-methoprene found in Frontline Plus PetAction Plus for Dogs contains the active ingredients fipronil and (S)-methoprene that effectively kills and controls fleas, ticks, and chewing lice. PetAction Plus for Dogs is fast-acting, long-lasting, waterproof, and easy to use. PetAction Plus for Dogs remains effective even after bathing, water immersion, or exposure to sunlight. PetAction Plus for Dogs can also be used on breeding, pregnant and lactating female dogs.