Protecting your dog from internal and external parasites has never been easier and more effective! Revolution for Dogs 41-85 pounds is the only FDA approved topical medicine for dogs that kills all 4 stages of the flea life cycle, ticks, mites, lice, and even heartworms. This once a month treatment enters the bloodstream through the skin, then redistributes to fully protect your pet! It effectively breaks the flea life cycle and prevents re-infestation. Keep your dog safe this summer with Revolution for Dogs 41-85 pounds.