Sentry Fiproguard Plus kills fleas, flea eggs, flea larvae, ticks and chewing lice. The fast-acting, long-lasting squeeze-on is formulated to protect your dog against dangerous pests. It breaks the flea life cycle by killing flea eggs and larvae and kills ticks that may transmit Lyme disease.Kills fleas, flea eggs, flea larvae, ticks and chewing lice for up to 30 daysStops the flea life cycle and kills flea eggs and larvae for up to 12 weeksKills ticks that may transmit Lyme diseaseWaterproof For use on dogs 8 weeks of age and over