Advantage II Flea Treatment for Large Dogs 21-55 lbs

Flea-Free Living for Your Large Dog, Month After Month

Advantage II Flea Treatment is specially formulated for large dogs weighing 21 to 55 lbs, delivering fast, effective, and waterproof flea protection with every application. Unlike treatments that require a flea to bite your dog to work, Advantage II kills fleas on contact — so your dog gets relief without the itch, the discomfort, or the risk. Whether your large dog is a daily trail runner, a park regular, or a couch companion, Advantage II keeps them comfortable and flea-free all month long.

Kills Fleas at Every Life Stage, Stops Reinfestation

Advantage II doesn't just kill adult fleas — its dual-action formula targets fleas at all life stages, including eggs and larvae, breaking the flea life cycle before it can take hold in your home or yard. Fast-acting within 12 hours of application, it provides a full 30 days of continuous protection per dose. The waterproof formula stays effective through baths and outdoor exposure, so your large dog's protection never takes a day off.

Trusted by Dog Owners Across the USA, Ships Fast to Your Door

Advantage II has been a trusted name in flea prevention for American dog owners for years, known for its ease of use and reliable results. Simply part the fur between your large dog's shoulder blades and apply the tube directly to the skin once a month. No mess, no fuss — just consistent, proven flea control. Orders ship fast within the US so your dog's protection starts right away.