FRONTLINE Plus for Dogs
It has been trusted by veterinarians for flea and tick control for dogs for nearly 20 years. Made with 2 tough-killing ingredients, Fipronil and (S)-Methoprene, one to kill adult fleas and ticks and the second to kill flea eggs and larvae, this fast-acting, long-lasting protection provides flea and tick control for dogs and puppies 8 weeks and older, 5 to 22 lbs. Its long-lasting formula is stored in the oil glands of the pet's skin to provide uninterrupted protection against fleas and ticks for a full 30 days