Now you can have the same active ingredients used in Frontline Plus at a more economical price. FiproGuard Plus contains fipronil and (S)-methoprene - the active ingredients used in Frontline Plus for dogs - for even better protection than regular FiproGuard. FiproGuard Plus topical flea and tick squeeze-on provides premium protection against fleas, ticks, and chewing lice. It kills deer ticks that transmit Lyme disease as well as brown dog ticks, American dog ticks and lone star ticks. It also controls mites that can cause sarcoptic mange. Because FiproGuard Plus kills ALL stages of the flea (adult fleas, flea eggs, flea larvae and prevents development of flea pupae), it controls re-infestation for up to three months. Waterproof formula can be used on breeding, pregnant and lactating dogs. Fast-acting, long-lasting, sustained-release formula protects dogs for up to 30 days. For use on dogs over 8 weeks of age. Made in the USA.