1-800-PetMeds Advantage II 4pk Dog 11-20 lbs by BAYER

What is Advantage II?

Advantage II is a monthly flea preventative for dogs and cats that offers comprehensive flea protection by killing adult fleas, larvae, and eggs. Plus, it kills fleas through contact, which means fleas don't have to bite your pet to die. Advantage II also treats, prevents, and controls lice on dogs. Advantage II does not kill ticks, so we recommend using the Preventic Tick Collar along with Advantage II (dogs only). Advantage II for small cats 5-9 lbs can also be used for ferrets weighing 1 lb or over and 10 weeks of age or older.



Dogs (7+ weeks of age, weighing 3+ lbs), Cats (8+ weeks of age, weighing 2+ lbs), Ferrets (10+ weeks of age, weighing 1+ lbs)



Convenient, once-a-month application

Kills through contact - fleas don't have to bite to die

Kills fleas within 12 hours of application on cats and dogs

Kills fleas within 24 hours of application on ferrets

Kills all flea life stages including flea eggs and larvae to prevent infestation

Treats, prevents, and controls lice infestations (dogs only)

Safe and easy to apply

Waterproof - remains effective even if pet gets wet (use of a soap-free shampoo is recommended)


How does Advantage II work?

The first active ingredient is imidacloprid, which acts on the nervous system of the flea to cause paralysis and subsequent death. Within 12 hours of application on cats and dogs, 98-100 percent of fleas are dead. Advantage II Small Cat kills the existing fleas on ferrets within 24 hours. The second active ingredient, pyriproxyfen, is an insect growth regulator. Once a female flea lays her eggs, pyriproxyfen works to prevent the eggs from hatching, ending the flea life cycle. Also, the active ingredient in Advantage II kills through contact, which means that fleas don't have to bite your pet to die. Reinfesting fleas are killed with protection against further flea infestation lasting for up to 4 weeks. Pre-existing pupae in the environment may continue to emerge for 6 weeks or longer depending upon the climactic conditions.