Advocate cat fleas heartworm and worms

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.