Sentry FIPROGUARD Plus for Dogs & Puppies 45-88 lbs. Topical Flea & Tick Treatment Kills fleas, flea eggs, flea larvae, ticks and chewing lice for up to 30 days Stops the flea life cycle and kills flea eggs and larvae for up to 12 weeks Kills ticks that may transmit Lyme disease Waterproof For use on dogs 8 weeks of age and over