~The ingredients in Advocate provide fast relief from fleas. With its “No Need to Bite” mode of action, Advocate kills fleas on contact; they don’t have to bite your cat to be killed which means more relief for your cat. Existing fleas are killed within 12 hours, and after this time re-infesting fleas are killed within 1 hour. The active ingredient, imidacloprid, is shed with the natural shedding of your cat’s skin and fur, killing flea larvae in the environment and breaking the flea lifecycle. Comprehensive protection from intestinal wormsMost wormers only kill adult worms in the intestines at the time of treatment, but this doesn’t solve the problem. Larvae migrate through your cat’s body causing damage, and along with the immature adults, soon mature into adults, not only causing harm to your cat, but also leading to environmental contamination from egg shedding before the next treatment. This puts you and your family at risk too! Advocate not only kills adult roundworms and hookworms, but also immature adult and larval stages of these worms, breaking the lifecycle.