The fast-acting, long-lasting squeeze-on contains the #1 vet-recommended active ingredient, fipronil, and (s)-methopreneWaterproof formula breaks the flea life cycle by killing flea eggs and larvae for up to 12 weeks and kills ticks that may transmit Lyme diseaseAlso controls mites that may cause sarcoptic mange and kills deer ticks, dog ticks, American dog ticks and lone star ticksKills adult fleas, flea eggs, flea larvae, ticks, chewing lice and prevents the development of flea pupae for up to 30 days