(Merial) Frontline Spray Treatment provides quick-acting, long-lasting treatment and control of fleas, ticks, and chewing lice on dogs, cats, puppies, and kittens over 8 weeks of age. Active ingredient Fipronil 0.29%. Kills fleas before they lay eggs. Kills ticks in all stages of life. Rapidly eliminates lice infestations. Aids in the control of sarcoptic mange in dogs. Frontline Spray Treatment stops existing infestations and prevents the establishment of new infestations by killing fleas, ticks, and chewing lice for at least 30 days. Waterproof.