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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. Observe your pet following treatment. Sensitivities may occur after using ANY pesticide product on pets. Please read entire manufacturer’s insert prior to using product. Approved for use in breeding, pregnant, or nursing animals. Consult with veterinarian before using on sick, medicated or aged animals.

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


Monthly treatments are required for optimal control and prevention of fleas and ticks. The dog should be standing for ease of application. Part the hair at your dog's shoulder blades to expose the skin. Apply product evenly and directly to the skin in two to six spots along the dog's back by squeezing out the tube's entire contents. Your dog's natural movements will help spread K9 Advantix II over the skin. K9 Advantix II remains effective after swimming or bathing (use a non-detergent-based shampoo).

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Customer Reviews

K9 Advantix II Flea & Tick Treatment for Dogs for 11-20 lbs is rated 4.6 out of 5 by 232.
Rated 3 out of 5 by from 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.
Date published: 2016-12-15
Rated 5 out of 5 by from 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
Date published: 2016-12-26
Rated 5 out of 5 by from Great product, have been using for awhile on my pets. Great stuff have been using this brand for sometime and will continue to use.
Date published: 2016-11-25
Rated 1 out of 5 by from 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 !)
Date published: 2016-11-25
Rated 5 out of 5 by from Satisfied Customer I have a130lb yellow lab that has been miserable with fleas and finally he appears to be getting relief. I have tried everything and spent a fortune on Vet bills to get him to stop scratching and finally he seems comfortable. I live on the Gulf Coast of Alabama and like most of the south it has been extremely dry this past year allowing the fleas to flourish but we have now found the remedy with Advantix II.
Date published: 2016-11-26
Rated 5 out of 5 by from 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.
Date published: 2016-12-10
Rated 5 out of 5 by from Good product, reliable and safe Have used this product or its predecessor for most of the time we've had dogs . The very few times when it was not readily available (we have lived in some pretty remote places0 or when I failed to order it in time for continuous protection, I have had many anxious hours and one tick of one dog. Worth every penny of the price for my peace of mind
Date published: 2016-11-29
Rated 5 out of 5 by from I love k9 advantage 11 I love k9 advantage 11 because it takes care of everything, I have not seen any fleas on my dogs since I've been using it
Date published: 2016-11-25
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