Provecta Advanced Flea Tick Medium Dogs 11–20 lbs 4-Month Topical ApplicationProvecta Advanced for Dogs 1120 lbs is a once a month topical application that kills and repels fleas, ticks (Brown dog ticks, American dog ticks, Lone Star ticks, and Deer ticks), lice, and mosquitoes and aids in the control of biting flies. For use on dogs seven weeks of age and older. 4 month supply. Key Points: 4 month supply for medium dogs 11 20lbs Once a month topical kills & repels fleas & ticks Repels mosquitoes, lice & biting flies For dogs