FRONTLINE Plus for Dogs 6-Month Supply Freeze! FRONTLINE(R) Plus stops disease-carrying fleas, ticks, and chewing lice in their tracks. It paralyzes the nervous system of these pests, effectively killing them, and prevents the development of flea eggs and larvae. This waterproof formula stays strong even after swimming, bathing, or playing in the rain. One easy, monthly application of FRONTLINE(R) Plus keeps itching at bay. Available in four sizes; select according to your dog's weight. Consult your vet before using. Features: Effectively kills fleas, flea eggs, ticks, and chewing lice Reduces the risk of parasite-transmitted infectious disease Fast and easy dermal application Only one application a month necessary Safe for puppies eight weeks or older and dogs of all sizes Approved for breeding, pregnant, and lactating dogs Waterproof 6-month supply Item Specifications: Size: 6-month supply For dogs weighing: 5-22 lb. 23-44 lb. 45-88 lb. 89-132 lb. Active Ingredients: Fipronil 9.8% S-methoprene 8.8% Also available in 3-month supply (item #150929).