Deliver total flea protection to your cat or kitten with Advantage II Large Cat. This vet-recommended, topical treatment and prevention formula kills adult fleas, flea larvae, and flea eggs on contact within 12 hours of application - meaning fleas can be eliminated before they bite or lay new eggs. Effectively break the flea life cycle, control existing flea and lice infestations, and prevent further infestations with one simple application. Advantage II Large Cat flea protection is effective on both indoor and outdoor cats. Your cat should be at least 8 weeks old and weigh over 9 lbs. to use Advantage II Large Cat.