Advantus Chewable Flea Treatment for Small Dogs, 4lb-22lbsSay goodbye to pesky fleas with Advantus (imidacloprid). When fleas ingest the product, the active ingredient over stimulates the flea's nervous system and kills the flea. For best results, use Advantus at the first sign of fleas. Follow the label instructions carefully, and keep out of reach of children and pets. For complete directions for use and safety information, see product label. Contains 7 soft chews for small dogs: A single dose of Advantus