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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 4.6 out of 5 by 224 reviewers.
Rated 5 out of 5 by Great product It didn't bother my dog at all when I applied it or after! He Is healthy and pest-protected January 4, 2017
Rated 5 out of 5 by We have used this product for 7 1/2 years We love the Advantix II flea and tick treatment product.We have never had a problem with fleas or ticks.We have 3 small dogs and the product is easy to apply December 26, 2016
Rated 1 out of 5 by Terribly Disappointed Having used this product for 6 months, I was shocked to find a live flea on my dog two weeks after treatment. He had irritated flea bites and then his skin broke out in a rash and he was scratching and biting all the time. A trip to the vet found an allergy to flea bites and a bacterial skin infection brought on by his attacking his skin. Poor baby. Vet does not like this product and switched to another. I'm holding a 4 pack of this stuff a $43 value that I cannot use. Of course I had opened it to read the instructions. The vet bill was over $300 and we're not out of the woods yet. Looks like saving money on this product didn't really work not to mention how much my little dog has been through. (And me too !) November 25, 2016
Rated 5 out of 5 by Good stuff This product does what it says it will do. Very good for the price. December 23, 2016
Rated 3 out of 5 by Didn't last as long as it should This product definitely worked, but did not last the full 4 weeks that it claims to. I ordered two treatments, and found fleas on my dog at just before 3 weeks after each treatment. I didn't bathe her and she didn't swim during those 3 weeks. She is right at the 20 lbs mark, so that could have something to do with it. December 15, 2016
Rated 5 out of 5 by It works!!! Nothing else has worked on my two dogs to keep the fleas under control until this. Will be ordering more soon!! December 16, 2016
Rated 5 out of 5 by Highly recommend this product The K9 Advantix flea and tick treatment did a perfect job of killing the fleas on my tiny puppy. The best part is the treatment did not make him ill. It didn't have a strong chemical smell like most other products and did not make him lethargic like other products did. I will always buy this product in the future. In fact, I immediately ordered a six month supply. December 9, 2016
Rated 1 out of 5 by Completely Ineffective The order I received was a flea attractant. I bought the correct dosage for both dogs (same litter), applied it correctly (I'm no stranger to flea & tick medications), and not one flea died, in fact they phoned friends to party it up. The expiration date was far into the future so I'd have to surmise the batch I received was either completely innate or snake oil as I consulted with the dogs' vet who suggested moving the next application date sooner than the standard 30 days, still had zero effect on the flea population. This stuff ain't cheap and I'll never waste my money on another Advantix product again. November 17, 2016
  • 2017-01-22 T07:17:07.760-06:00
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