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Advantage II Flea Treatment for Dogs 11-20 lbs

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Advantage II Flea Treatment for Dogs 11-20 lbs is a convenient monthly topical flea treatment for dogs and puppies 7 weeks of age and older. Advantage II for dogs contains an adulticide (imidacloprid) and an insect growth regulator (pyriproxyfen) to kill all life stages of fleas. Furthermore, it kills fleas through contact, so they don’t have to bite your dog to die. One convenient application of Advantage II keeps working for 1 month.

Key Benefits

  • Kills all flea life stages including flea eggs, larvae, pupae, and adult fleas
  • Kills fleas within 12 hours of initial application
  • Once a month topical treatment for fleas and lice
  • Works through contact, so fleas don’t have to bite to die
  • For use only on dogs and puppies 7 weeks and older


DO NOT USE ON CATS. Do not apply to puppies or dogs weighing less than 3 lbs. 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, 9.10%
  • Pyriproxyfen, 0.46%

See all items by Advantage II

  • Item Number
  • Brand
  • Breed Size
  • Lifestage
    Puppy, Adult
  • Made in
    United States


Once-a-month topical treatment for the prevention and treatment of flea and lice infestations on dogs and puppies 7 weeks and older. Apply the entire contents of the tube evenly to three or four spots on the top of the back from the shoulder to the base of the tail.

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Customer Reviews

Rated 4.6 out of 5 by 61 reviewers.
Rated 5 out of 5 by It has always worked for our pet. We love buying from chewy. It is the best for your pet needs of any kind. Prices are great, product and service are wonderful. Fast delivery too !!! :) October 24, 2016
Rated 4 out of 5 by Product works better then other flea meds This is a great site. The products are priced right and shipped immediately. The staff is courteous and very helpful. I would recommend this site for anyone who needs products for their animals October 10, 2016
Rated 5 out of 5 by This product is useful as a flea and tick preventative. We use this product to keep our pet free of fleas and ticks. It is easy to apply and is quite effective. October 11, 2016
Rated 4 out of 5 by Working well Switched to Advantage II from Frontline Plus that I had been using for years. I personally think that the fleas have built up a resistance to the active ingredients in Frontline Plus because it used to work well, but recently seemed to have little affect. Of course no one topical is going to take care of an infestation. You will still see fleas on your pet unless you do a total regiment of treating the yard, bedding and carpeting. At a minimum bedding must be washed and floors vacuumed regularly. If you bath and treat your pet, and then they go lay down on bedding infested with fleas...well you can bet you will see fleas on your pet. I used Advantage II on my 5 dogs ranging in weight from 6 to 22 lbs with no adverse reactions, which is just as important to me as how well the product works. I have to buy two different doses due to the weight range of my dogs. Be sure to use the right dosage for the dogs weight of course. So far working well, have seen a drastic reduction in active fleas on my dogs. Of course when using any kind of flea prevention (aka: pesticide) research risks, as well as benefits. July 14, 2016
Rated 3 out of 5 by Great price It really was my fault but I did not realize the product did not cover ticks. Next time I will read more about the product. September 15, 2016
Rated 5 out of 5 by Works great! Pleased with the speed and ease of delivery and ordering on line! Rapid responses and prompt! Thanks! August 26, 2016
Rated 4 out of 5 by Good product, great service! We have used this product before. It usually kills fleas and keeps them off for a month. The last meds that we had before this only lasted about 2 weeks. Chewy's mail order service was great. We got this product quickly without having to pay extra fees. August 15, 2016
Rated 5 out of 5 by effective medicine Fle.as are never a problem until they are..then it's too late. Good medicine, fair pricing August 21, 2016
  • 2016-10-31 T06:31:37.962-05:00
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