Advantage II Topical Flea Treatment for Dogs is a once a month topical flea prevention and treatment for dogs, and is for use only on dogs 7 weeks and older. Advantage II Topical Flea Treatment for Dogs kills fleas in all life stages preventing a flea infestation. Advantage II Topical Flea Treatment for Dogs remains effective after swimming or a bath. For best results, use a non-detergent based shampoo. Advantage II Topical Flea Treatment for Dogs kills adult fleas in your home within 12 hours and re-infesting fleas within two hours. Keep your pet's environment protected with the use of Advantage II Topical Flea Treatment for Dogs.