K9 Advantix II Medium Dog – Flea, Tick & Mosquito Treatment (11-20 lbs) | 6-Dose Pack

All-in-one pest protection for 11–20 lb dogs

K9 Advantix II Medium Dog is formulated for dogs at least 7 weeks old and weighing 11–20 pounds. This veterinarian‑recommended topical treatment provides month‑by‑month defense against common pests that can affect daily life, from cozy sofa snuggles to park adventures. The fragrance‑free formula is designed to be discreet, so you can apply it without a strong scent lingering on your dog or home.

What pests are covered?

The formula targets five common pests: fleas, ticks, mosquitoes, biting flies and lice. By killing fleas on contact and repelling others, it helps reduce discomfort and the chance of new infestations during outdoor play or indoor lounging.

• Fleas: helps reduce infestation risk by killing fleas on contact, potentially limiting the flea life cycle.
• Ticks and mosquitoes: provides repellent and killing action to lower outdoor exposure during walks and backyard time.
• Biting flies and lice: broad coverage for everyday pet care.

How it works and what to expect

After application, fleas on your dog are killed within 12 hours. The product works on contact, meaning fleas don’t need to bite to die, and it helps prevent future generations by stopping adult fleas from laying eggs. Mosquitoes are repelled, helping reduce biting during warm evenings, while ticks and other pests receive comprehensive coverage during outdoor adventures.

• Kills fleas within 12 hours of application on contact.
• Repels and kills mosquitoes and ticks for ongoing outdoor protection.

Ease of use, safety, and convenience

The topical treatment is fast to apply, fragrance‑free, and waterproof after 24 hours. There’s no pill to swallow and no prescription needed. With 2‑, 4‑, and 6‑dose packs, you can align purchases with your monthly routine and never miss a treatment.

Practical use and expectations

Many pet parents report quick, simple applications that fit into a busy schedule. Regular monthly use supports year‑round pest management for dogs that enjoy both indoor comfort and outdoor exploration. Results can vary by individual dog, but many owners appreciate the combined protection across several pest types in one easy dose.

For best results, follow the label directions, apply to a clean, dry area at the base of the neck, and monitor your dog after use. Store the product in a cool, dry place and keep it out of reach of children and other pets. This OTC solution is designed to be convenient for daily life without the need for a prescription.