Frontline Plus for Dogs Large Dog (45 to 88 pounds) Flea and Tick Treatment, 3 Doses WATERPROOF FLEA AND TICK TREATMENT FOR DOGS: provides waterproof, fast-acting, long-lasting flea and tick treatment and control for your dog This product is approved for use on dogs 45-88 lbs BREAK THE FLEA LIFE CYCLE WITH FRONTLINE: kills adult fleas plus flea eggs and larvae to stop existing infestations and prevent establishment of new infestations KILLS FLEAS AND TICKS: kills fleas, flea eggs, lice, and ticks. This flea and tick treatment kills ticks, including those that may transmit Lyme disease TRUSTED FLEA AND TICK PROTECTION FOR DOGS: trusted by veterinarians for nearly 20 years LASTING FLEA AND TICK PROTECTION: long-lasting formula is stored in the oil glands of the pets skin to give non-stop flea and tick protection for a full 30 days Frontline flea and tick treatment for dogs works non-stop for a full 30 days. A 3-dose supply lasts for 3 months