Advantus Dog Advantus Chewable Flea Treatment for DogsSay goodbye to pesky fleas with Advantus (imidacloprid). This powerful flea treatment provides fast and effective relief. A single dose of Advantus soft chews starts killing adult fleas within one hour and is out of their system in 24 hours.* While it does not prevent fleas, the active ingredient, imidacloprid, is a potent insecticide that works to kill fleas when they bite your dog. When fleas ingest the product, the active ingredient over stimulates