Frontline Plus is the most complete flea and tick control available for your cat’s care. Not only does Frontline Plus kill 98–100% of adult fleas on your pet within 24 hours, it also contains a special ingredient that kills flea eggs and larvae to keep ALL stages of fleas from developing and bothering your pet and your family. Frontline Plus completely breaks the flea life cycle by effectively stopping the development of new fleas. For Use on Cats 8 Weeks And Older.