Advantage Flea Control for dogs and cats contains 9.1% Imidacloprid. Kills 98-100% of the fleas within 12 hrs and prevents reinfestation for up to 4 weeks. Kills fleas before they lay eggs. Each package has 4 tubes, a 4 month supply of flea control also available 6 tubes, for a 6 month supply. For dogs, cats, kittens and puppies over 7 weeks of age.
