Advecta Plus Flea Protection for Cats (9 lbs and Over) contains the same active ingredients as Advantage II for Cats*. This cat flea topical kills adult fleas within 12 hours of application while preventing flea re-infestations for 30 days by killing flea eggs and flea larvae. Killing through contact, ADVECTA Plus for Cats flea treatment helps control the flea life cycle. *ADVECTA Plus is not manufactured or distributed by Bayer HealthCare LLC. Advantage II is a registered trademark of Bayer.