Rather than using multiple treatments that may be too harsh for your dog, use Revolution for Dogs 41-85 pounds to rid of all internal and external parasites in one simple treatment each month. Revolution is the only FDA approved topical medication for dogs. It effectively kills all four stages of fleas, American dog ticks, mites, lice, and heartworms. It enters your dog’s blood stream through the skin and provides systemic treatment against a broad spectrum of external and internal parasites. It’s an easy to use, once a month application that provides ultimate protection against biting insects and parasites that can cause disease and health problems. Take good care of your dogs health and control parasites with Revolution for Dogs 41-85 pounds.