K9 Advantix® II flea, tick and mosquito prevention for dogs

For over 20 years, dog owners have trusted the K9 Advantix® brand to kill and repel fleas, ticks and mosquitoes. With one easy-to-apply topical treatment, K9 Advantix® II works all month to kill pests through contact so they don’t have to bite your pet to die. Just select your dog’s weight, your preferred number of doses and your favorite retailer below to buy now.

How does K9 Advantix® II work?

Drawings of a tick and a flea in a strikethrough circle on an opaque forest background

Easy flea and tick drops for dogs

K9 Advantix® II goes on in seconds; apply drops directly on your dog's skin. (See product label for complete directions for use.) It kills fleas on dogs within 12 hours — half the time of other leading topicals*  — and continues providing triple-pest protection all month long.  



*Based on label claims.

Drawing of a mosquito in a strikethrough circle on an opaque forest background

Includes mosquito repellent for dogs

Unlike most competitors, K9 Advantix® II is more than flea and tick prevention for dogs. It also kills and repels mosquitoes that may transmit heartworm disease. Swampy or wet areas are no problem either. K9 Advantix® II is waterproof after 24 hours and stays that way for 30 days.

One red paw and a plus sign in a strikethrough circle on an opaque forest background

Vet-recommended* flea and tick prevention for dogs

No prescription needed. K9 Advantix® II is effective on dogs and puppies 7 weeks of age and older that weigh 4 or more pounds. Vets love how K9 Advantix® II is effective against deer ticks, American dog ticks, brown dog ticks and Lone Star ticks.

Two red paws and a plus sign in a strikethrough circle on an opaque forest background

Protection for large and small dogs

K9 Advantix® II comes in different strengths and dosages to best fit your furry friend. Whether your pet is a gentle giant or fun-sized, K9 Advantix® II provides convenient flea, tick and mosquito prevention for dogs of all sizes.

K9 Advantix® II comes in different dosage sizes and package quantities. Get it for your dog or puppy today.

K9 Advantix® II kills and repels ticks that may carry Lyme disease

Lyme disease in dogs can be hard to diagnose — 95% of dogs show no clinical signs when they are first infected. While it can be treated, Lyme disease can cause irreversible damage over time to the joints and kidneys. Prevention against Lyme disease in dogs is key, and protection from ticks is easy with consistent application of K9 Advantix® II.

See how K9 Advantix® II for dogs stacks up to the competition.

Compare K9 Advantix® II against other brands, such as Frontline® Plus, PetArmor® Max, NexGard® and Bravecto®.

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KILLS FLEAS & TICKS
REPELS FLEAS & TICKS
KILLS MOSQUITOES
REPELS MOSQUITOES

Based on label claims. 

Do not use K9 Advantix® II on cats.

How to apply K9 Advantix® II for dogs 

Parasite protection for your home

From the depths of your couch to the grass in your backyard, The Advantage® Family is dead serious about pet parasites. Our family of products specializes in flea protection for cats**, flea and tick protection for dogs, and preventing flea and tick infestations in your own backyard. If you're ready to show these pesky pests who’s boss, it's time to join the family.

K9 Advantix, Elanco and the diagonal bar logo are trademarks of Elanco or its affiliates. Frontline and NexGard are registered trademarks of Boehringer Ingelheim Animal Health. Bravecto is a registered trademark of Intervet, Inc. dba Merck Animal Health. PetArmor is a registered trademark of Velcera, Inc.

Do not use K9 Advantix® II on cats.

**For complete directions for use and safety information see product label.