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K9 Advantix® II

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K9 Advantix® II

Bayer Animal Health

A once-a-month topical tick, mosquito and flea treatment for dogs and puppies 7 weeks of age or older.

Contains Imidacloprid and Permethrin plus insect growth regulator Pyriproxyfen.

Repels and kills ticks for up to four weeks. Repels and kills fleas of all life stages. Kills fleas within 12 hours of application and prevents further flea infestations for a month. Prevents development of fleas, flea eggs, pupae and larvae for a month. Repels and kills mosquitoes for up to four weeks. Repels and prevents blood feeding by biting flies. Kills chewing lice.



When using any topical spot-on flea treatment, you should not bathe your pet 48 hours before or after application. The oils of the skin and coat help to distribute the product properly, ensuring that the product will be effective.

View manufacturer and/or label information

Item # Description Price Each Qty
E8-K1 K9 Advantix® II, Under 10 lbs - 4 month supply Each $46.99
In Stock

Restricted States: PR
E8-K2 K9 Advantix® II, 11-20 lbs - 4 month supply Each $47.99
In Stock

Restricted States: PR
E8-K3 K9 Advantix® II, 21-55 lbs - 4 month supply Each $49.99
In Stock

Restricted States: PR
E8-K4 K9 Advantix® II, Over 55 lbs - 4 month supply Each $51.99
In Stock

Restricted States: PR
E8-K6 K9 Advantix® II, Under 10 lbs - 6 month supply Each $65.99
In Stock

Restricted States: PR
E8-K7 K9 Advantix® II, 11-20 lbs - 6 month supply Each $65.99
In Stock

Restricted States: PR
E8-K8 K9 Advantix® II, 21-55 lbs - 6 month supply Each $68.99
Available Date 4/21/2014
Back Order

Restricted States: PR
E8-K9 K9 Advantix® II, Over 55 lbs - 6 month supply Each $71.99
In Stock

Restricted States: PR

Customers Ratings and Reviews

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 - Saturday, May 25, 2013
Worth Every Penny...
Reviewed By:  Gayla (Bland, Missouri) 
K9 Advantix II is worth every single penny, and then some. Since moving to Missouri, I've always used Frontline Plus. It's an OK product but it does NOT repel anything and I was constantly finding ticks all over Chico (my Shih Tzu) and they were attaching themselves to him. Every single time he would go outside I found ticks that were very much alive. Too creepy for me! So this year I was determined to try something new, that's how I found out about K9 Advantix II. It works like a charm!!Since September of 2012 I have not had one single tick on my dog, not one. This product also repels and kills: mosquito, fleas and other insects. It's a little more expensive but it's worth it. We live in a very wooded area that is prime for ticks so having a product like this is a awesome. I highly recommend it to anyone who is looking to replace FrontLine Plus. I don't usually get so excited about products but I felt I had to share my personal experience. Good luck and I hope you love K9 Advantix II as much as I do.

 - Wednesday, January 23, 2013
Wonderful Product
Reviewed By:  Doxie Lover (Middletown, Ohio) 
We had moved into a new area almost a year ago. At our former location, we never had a real problem with fleas. That changed this year! Having 7 dogs to treat, I tried the "cheap" way. I bought the "groomer's pack" which was a waste of money. I tried sprays, shampoos then THIS! I purchased the 55 lb. and over package. Two tubes treated all of my doxies (6) and my pug. I treated them in the evening. The next morning I changed their bedding. I couldn't believe all of the dead fleas on their blankets! This stuff works and I will NEVER waste my time and money on anything else!

 - Thursday, August 23, 2012
The BEST flea and tick repellent
Reviewed By:  girliegirl1214 (Pittsburgh, Pennsylvania) 
When our oldest dog was a six month old puppy, we tried Frontline at the veterinarian’s recommendation. It was a disaster. The medication caused his skin to become so irritated that he developed a sore on the back of his neck. To make matters worse, the Frontline was ineffective. We all had to live with fleas for two or three weeks, while his sore healed enough to permit us to apply an alternative flea and tick medication. During that time, we did a lot of research on similar medications. Everyone recommended K9 Advantix II. We tried it and it worked wonderfully. We love that it is waterproof. And, each application lasts five to six weeks. Plus, it is the only medication we found, which can be used on both of our dogs, who weigh between twenty- one and fifty- five ponds. Our oldest dog has never had any problems with this medication and it has been equally effective on our other dog. We will NEVER use another flea and tick medication.
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