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K9 Advantix II Flea & Tick Treatment for Dogs for 11-20 lbs

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K9 Advantix II Flea Treatment for Dogs offers broad spectrum flea control and protection against ticks and mosquitoes, too. It is specifically formulated for dogs and comes in a convenient, monthly topical application that not only kills but also repels fleas, ticks and mosquitoes. K9 Advantix II also kills all life stages of fleas, repels biting flies and kills lice. It contains imidacloprid, permethrin and pyriproxyfen that work in concert to repel and kill parasites that can potentially transmit disease-causing organisms. K9 Advantix II is a flea treatment for use on dogs 7 weeks and older.

Key Benefits

  • Specifically formulated for dogs and comes in a convenient, monthly topical application that not only kills but also repels fleas, ticks and mosquitoes
  • Repels and kills ticks of all types including deer ticks, American dog ticks, Brown dog ticks and Lone Star ticks
  • Prevents fleas on treated dogs from infesting your home
  • Kills fleas on dogs within 12 hours and continues to prevent infestations for a month
  • Contains imidacloprid, permethrin and pyriproxyfen which work to repel and kill parasites that can potentially transmit disease-causing organisms


DO NOT USE ON CATS. Do not get this product in your dog's eyes, or allow your dog to ingest this product. ALWAYS read the entire product label prior to use.

Active Ingredients

  • Imidacloprid, 8.80%
  • Permethrin*, 44.00%
  • Pyriproxyfen, 0.44%
    *cis/trans ratio: max 55% (±) cis and min 45% (±) trans

See all items by K9 Advantix II

  • Item Number
  • Brand
  • Breed Size
  • Lifestage
    Puppy, Adult


Topical prevention and treatment of ticks, fleas, mosquitoes, biting flies and lice for monthly use on only dogs and puppies 7 weeks of age and older. Monthly treatments are required for optimal control and prevention of fleas and ticks. The entire contents of the K9 Advantix II tube should be applied evenly to three spots on the top of the back from the shoulders to the base of the tail. Place the tip of the tube on the skin and gently squeeze to expel a portion of the solution on the skin.

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Customer Reviews

Rated 4.7 out of 5 by 177 reviewers.
Rated 5 out of 5 by Finally!!!!! After loosing our 8 year old yorkie to lymes disease this past July we knew we needed something that was more effective and helped with not only fleas but TICKS! I read so many product reviews, and decided to give K9 Advantix II a try, and I am so happy we did. Our Lab mix and now 5 month old Cavachon puppy have been doing amazing with this product. We noticed a huge change with less scratching, and when we saw fleas on them , they were so slow moving. I would advise anyone whom has cats weather they are indoor/outdoor to use Advantage II for them, as no we are totally FLEA free in our household! I wish we used this many years ago! October 18, 2016
Rated 5 out of 5 by This product is great I have found this product works much better for my dog than Frontline. October 27, 2016
Rated 5 out of 5 by I'm a customer for life. We love this product, our dog is getting older and when we went to our Vet to get the same thing we have driven all the way back to our old home town because they were the cheapest but they were out of stock for 2 wks. While waiting for it I searched the internet for a better place and chewy.com came through in 2 days and was by far cheaper than anywhere else. For the same product. And free freight always helps.Thank you chewy.com I'll be a customer where ever I go and recommend it to everyone. October 14, 2016
Rated 5 out of 5 by Product was recommended by ou Vet We breed Coton de Tulear dogs. We always have a bunch in the house. We use chewy.com for most of our supplies. They do a great job. The Advantix II was on sale and was the best buy I could find anywhere. They do a great jib and so does Advantix II October 23, 2016
Rated 4 out of 5 by As Advertised Have got K9 Advintix II in the past so am aware that it is an excellent product that WORKS AS ADVERTISED. Recently got it for less $$ than what the local animal hospital was charging for their product that does the same. October 18, 2016
Rated 5 out of 5 by Effective Flea & Tick Treatment I have been using this product for over 7 years for my dachshund. I have never, ever seen a flea or tick on him during that time. I am very satisfied with this product. I know there are less costly products, but I prefer to stay with a product I know is effective rather than take a chance. October 11, 2016
Rated 5 out of 5 by Great Flea Prevention Product I have been using Frontline Plus on my 6 year old Cockerpoo since she was a puppy and realized lately that she has been getting fleas. I have seen a flea once in a while in the past but didn't realize that Frontline wasn't working effectively. I put on the K9 Advantix II 10 days ago and she has been flea free. I have a friend who had the same problem with Frontline Plus and also read a number of reviews stating that Frontline Plus was not working as it should. No more Frontline Plus for my dog only K9 Advantix II October 7, 2016
Rated 5 out of 5 by AMAZING product, even more amazing price!! At the recommendation of my Mom's dog's groomer we purchased this stuff to battle the fleas on her Pomeranian. Within a few hours she had all but stopped itching and whining! THis stuff is AWESOME and you cant beat the price here on Chewy!!!! October 11, 2016
  • 2016-10-31 T06:32:33.060-05:00
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