K9 Advantix topical flea and tick treatment for dogs 11-20 lb — 2 monthly waterproof doses, fast-acting repellent

K9 Advantix for Medium Dogs is a fast-acting topical treatment that kills and repels fleas, ticks, mosquitoes, biting flies, and lice for up to 30 days per application.

Designed for dogs weighing 11–20 pounds and at least 7 weeks old, this two-dose pack delivers monthly protection without pills or collars. The waterproof, fragrance-free formulation begins working on contact and starts stopping flea activity within 12 hours of the first application. It's a convenient, affordable option from the K9 Advantix line for pet owners who prefer an easy topical routine to manage external parasites.

How quickly will K9 Advantix stop an existing flea problem?

K9 Advantix begins killing fleas on contact and can stop flea activity within about 12 hours after the initial application. It interrupts the flea life cycle by killing adult fleas before they lay new eggs, helping reduce reinfestation risk.

• Works on contact — no need for an initial flea bite.
• Starts reducing adult flea activity within 12 hours of application.
• Monthly reapplication helps prevent new eggs from establishing.

Is this product safe and easy to apply to my medium-sized dog?

The treatment is a topical liquid applied to the skin at the base of the neck; application takes only moments and dries to a waterproof residue after 24 hours. Follow label directions for dose and application frequency; product is not for use on cats and should only be used on dogs meeting the age and weight guidelines.

• Single-dose tubes designed for quick spot application to the skin.
• Waterproof after 24 hours so normal activities can resume.
• Fragrance-free for minimal scent exposure to you and your pet.

What pests does K9 Advantix protect against, and how long does each dose last?

Each monthly application targets a broad range of external parasites including fleas, multiple tick species, mosquitoes, biting flies, and lice. Protection is intended for 30 days per treatment when used as directed on the label.

• Kills and repels fleas and several species of ticks.
• Also repels and controls mosquitoes, biting flies, and lice.
• One application delivers about 30 days of protection for dogs 11–20 lbs.

Can I use K9 Advantix alongside other parasite controls or on puppies?

Use as directed on the product label; K9 Advantix is appropriate for dogs at least 7 weeks old. Consult product instructions or your veterinarian before combining with other parasite treatments to ensure compatibility and safety.

• Approved for puppies 7 weeks and older that weigh 11–20 lbs.
• Do not use on cats or animals sensitive to spot-on ingredients.
• Check with a veterinarian before adding other topical or systemic parasite products.

Who is this product for? K9 Advantix Medium Dog is aimed at owners of small-to-medium dogs who want a simple monthly topical treatment that covers a wide range of biting pests. It's a practical choice for households seeking an over-the-counter, cost-effective repellent and killer that acts quickly and resists water after drying. If your dog meets the age and weight requirements and you prefer a non-oral, non-collar solution for parasite control, this two-treatment pack offers an easy way to keep outdoor and indoor encounters with fleas, ticks, and mosquitoes under control. Always read and follow the label instructions and consult a veterinarian with specific health concerns or before treating pets with existing conditions.

Ingredients

Imidacloprid, Permethrin