Frontline is Fast-acting & Effective: •Frontline Plus provides your cat with the most complete spot-on flea and tick protection. •Kills 98-100% of adult fleas on your cat within 24 hours. •Research has verified that greater that 99% of fleas are killed within 18 hours of Frontline Plus application. •The active ingredient fipronil (kills newly acquired adult fleas) has been combined with the trusted insect growth regulator (S)-methoprene, which kills flea eggs, larvae and prevents pupae development. •Frontline Plus effectively targets all stages of fleas. Fipronil collects in the oils of the skin and hair follicles, and continues to be released from hair follicles onto the skin and coat, resulting in long-lasting activity against fleas and ticks. •By effectively stopping the development of new fleas, Frontline Plus completely breaks the flea life cycle. •Frontline kills fleas and all stages of brown dog ticks, American dog ticks, lone star ticks and deer ticks (which may carry Lyme disease). •Kills lice. •Clinically proven to eliminate chewing lice and aid in the control of sarcoptic mange. •Convenient treatment and control of fleas and ticks for cats and kittens 8 weeks or older. •Can be used on breeding, pregnant, and lactating queens. Easy to Use: •Frontline Plus is easily applied just once a month to a single spot on your cat, between the shoulder blades. •Hold applicator upright and snap applicator tip away from face and body. Place applicator tip through animal's hair to the skin level between the shoulder blades. Squeeze applicator, applying entire contents in a single spot to the animal's skin. Avoid superficial application to the animal's hair. Only one applicator per treatment is needed. •Completely waterproof, remains effective even if your cat gets wet or is shampooed without the need for re-application. Frequency of Application: •When used monthly, Frontline Plus for Cats completely breaks the flea life cycle and controls tick infestations. •Research demonstrates that a monthly treatment of Frontline Plus kills adult fleas, flea eggs, and flea larvae (preventing development of all flea stages) for up to six weeks and kills ticks for at least one month. •A once monthly application is recommended where tick control is needed. •Although Frontline Plus can control fleas for up to six weeks, if there is a high risk of reinfestation or if the pet has fleas which may cause flea allergy dermatitis, a once monthly application may be needed. Contains 6 ampules, enough for 6 months.