And Frontline Plus cats is fipronil 10g plus S-methoprene 12g.

Same Active Ingredients Used In FRONTLINE® Plus for Cats
Advantage, Fronline Plus and Revolution are three brands of flea medicine for cats that also treat different things, as Frontline Plus kills ticks and flea eggs and Revolution prevents heartworm, round worm and hook worm infestations. Compare these three flea medications with advice from a practicing veterinarian in this free video on pet care.

Expert: James Talbott
Bio: Dr. James R. Talbott is a staff veterinarian at Belle Forest Animal Hospital and Kennel in Nashville, Tenn.
Filmmaker: Dimitri LaBarge
Same Effectiveness As FRONTLINE® Plus for Cats
Frontline Plus for Cats provides fast, effective and convenient treatment and control of fleas, ticks and chewing lice for cats and kittens 8 weeks or older. It kills fleas, flea eggs and larvae, ticks and chewing lice. Frontline Plus is fast-acting, long-lasting and waterproof. Lots of vets & shelters use the “dog” version of Frontline Plus on both dogs and cats.I've frontlined the cats on Tuesday and just saw a dirty little bugger flea crawling on Kylie.
Frontline Plus is a monthly topical flea and tick preventative for dogs and cats. Frontline Plus kills 100% of adult fleas on your pet within 12 hours and 100% of all ticks and chewing lice within 48 hours. Frontline Plus contains an insect growth regulator, S-methoprene, which kills flea eggs and larvae. It's effective against all stages of the brown dog tick, the American dog tick, the lone star tick and the deer tick (the major carrier of Lyme disease). (3 Pack = 3 doses which lasts 3 months.) Frontline Plus provides convenient and effective flea and tick control in dogs and cats, puppies and kittens. It is effective against all stages of the brown dog tick, the American dog tick, lone star tick and deer ticks (the major carrier of Lyme disease). It also kills flea eggs and flea larvae. Frontline Plus rapidly eliminates infestations with chewing lice. Frontline Plus for Dogs and Puppies also aids in the control of sarcoptic mange infections.Kills fleas, flea eggs & larvae, ticks, & chewing lice. For use only on cats & kittens 8 weeks and older. Contains 3 - 0.017 fl oz (0.50 ml) applicators. Fast-acting. Long-lasting. Waterproof. Kills ticks, including those that may transmit Lyme disease. Frontline Plus for Cats provides fast-acting, long-lasting, waterproof treatment and control of fleas, ticks, chewing lice for use only on cats and kittens 8 weeks or older. Satisfaction guaranteed. For cat use only. Made in France.Use Frontline Plus for Dogs (fipronil 9.8% and S-methoprene 8.8%) on dogs and puppies 8 weeks or older. Frontline Plus for Dogs is available as 0.67 ml applicators for use on dogs and puppies up to 22 lbs, 1.34 ml applicators for dogs 23-44 lbs, 2.68 ml applicators for dogs 45-88 lbs and 4.02 ml applicators for dogs 89-132 lbs. Wait 24 hours to fully dry before swimming or bathing. Do not reapply for 30 days. Use Frontline Plus for Cats (fipronil 9.8% and S-methoprene 11.8%), available as 0.5 ml applicators, on cats and kittens 8 weeks or older. Place the applicator tip through the animal's hair to the skin level between the shoulder blades. Apply the entire contents of the applicator in a single spot to the animal's skin. Use only one applicator per treatment.See insert for first aid and precautionary statements. It is a violation of Federal Law to use this product in a manner inconsistent with its labeling. Do not allow children to apply product. To prevent harm to you and your pet, read entire label and enclosed directions before each use. Follow all directions and precautionary statements carefully. Use on cats only. Do not use on rabbits. Do not use on other animals. To kill fleas, flea eggs & larvae, ticks, and chewing lice apply Frontline Plus for Cats as follows: To Remove Applicator: Lift and remove the plastic tab to expose foil backing; then peel away the foil. Or use scissors to open. Open applicator. Hold upright with foil side toward you and snap applicator tip. Apply Frontline Plus. Part the cat's hair above the shoulder blades, at the base of the neck. Place the applicator tip just above the skin and squeeze. Apply entire contents of the applicator in a single spot directly onto the cat's skin. Do not apply on top of the hair coat. Avoid contact with treated area until dry. Frontline Plus for Cats is approved for use on all cats, including breeding, pregnant, and lactating queens and kittens as young as 8 weeks. Frontline Plus remains effective even after bathing, water immersion, or exposure to sunlight. Frequency of Application: When used monthly, Frontline Plus completely breaks the flea life cycle and controls tick and chewing lice infestations. Do not reapply Frontline Plus for 30 days. Frontline Plus kills adult fleas, flea eggs, and flea larvae for up to six weeks. Frontline Plus also prevents development of all flea stages for up to six weeks. Frontline Plus can control fleas for up to six weeks, however, if there is a high risk of reinfestation or if the cat has fleas which may cause flea allergy dermatitis, a once monthly application may be needed. Frontline Plus kills ticks for at least one month. A once monthly application is recommended where tick control is needed. Frontline Plus kills all life stages of ticks (larva, nymph and adult). Frontline Plus kills ticks that may transmit Lyme disease, Rocky Mountain spotted fever, ehrlichiosis, babesiosis, anaplasmosis, haemobartonellosis and other tick-borne diseases. Frontline Plus kills chewing lice for at least one month. A once monthly application is recommended where chewing lice control is needed.Frontline for dogs or frontline plus is a flea preventive medication that’s available for both canines and felines. It is a topical medication that needs to be applied to the pet’s skin once a month. Several pet owners are of the opinion that it’s safe and economical to use frontline for dogs on cats but this isn’t true. Frontline for dogs contains two active ingredients namely fipronil and s-methoprene in certain amounts. The same ingredients are present in thecat formula but in varying amounts. Since pets are very sensitive to medications it’s important to avoid using dog formulas on cats or vice versa.