K9 Advantix II Medium Dog – Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11–20 lbs.

Keep your medium-sized dog protected all season long with K9 Advantix II, a veterinarian-recommended, once-monthly topical treatment specially formulated for dogs weighing 11–20 lbs. This broad-spectrum solution doesn't just repel pests — it actively kills and repels fleas, ticks, and mosquitoes, while also defending against biting flies and lice, making it a comprehensive shield against five common parasites in one easy application.

Powered by a proven combination of active ingredients — Imidacloprid, Permethrin, and Pyriproxyfen — K9 Advantix II gets straight to work, killing fleas on contact within 12 hours of application. This contact-kill action means fleas don't need to bite your dog to die, helping to stop existing infestations and prevent new ones by targeting all flea life stages, including eggs and larvae. The formula also helps protect against the transmission of tapeworms, Flea Allergy Dermatitis, and flea bite anemia.

Application couldn't be simpler: this fragrance-free, spot-on topical treatment applies directly to your dog's skin in seconds — no pills to force down, no collar to fuss with. Once applied, it becomes waterproof after 24 hours, maintaining its effectiveness through baths, swimming, and rainy days. Suitable for both indoor and outdoor dogs aged 7 weeks and older, K9 Advantix II is available over-the-counter, with no prescription required.

✨ Key Highlights:

• Vet-recommended monthly topical treatment
• Kills and repels fleas, ticks, and mosquitoes
• Also protects against biting flies and lice
• Active ingredients: Imidacloprid, Permethrin, Pyriproxyfen
• Kills fleas within 12 hours of application
• Fragrance-free and waterproof after 24 hours
• For dogs 11–20 lbs., 7 weeks or older
• No prescription needed — available over-the-counter