Advantage II Flea Treatment for Dogs 11-20 lbs
Advantage II contains the proven ingredient imidacloprid, which works through contact to dsable a flea's nervous system, so fleas don't have to bite to die. No other company offers a flea control product with imidacloprid.
Proven to stop fleas from biting in 3-5 minutes after application. Kills 98-100 percent of fleas within 12 hours of initial application. In addition, one convenient treatment lasts for up to one month.