Fiprotec is a spot-on solution that kills fleas, ticks and biting lice. It is easy to administer with a pipette in the neck. Fleas die within 24 hours and ticks and lice within 48 hours. It also breaks the flea's cycle by stopping the development of eggs and larvae in your home for 8 weeks. So you can prevent new fleas from jumping onto your dog from the environment.