Search  for anything...
K9 Advantix

K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 1-Mo Supply

  • Based on 42,745 reviews
Condition: New
Checking for the best price...
$19.97 Why this price?

Buy Now, Pay Later

As low as $4 / mo
  • โ€“ 4-month term
  • โ€“ No impact on credit to apply
  • โ€“ Instant approval decision
  • โ€“ Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Jul 13
Order within 4 hours and 18 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

Size: 1 Pack


Features

  • K9 Advantix II Large Dog 30-day treatment & prevention protects dogs 21-55 lbs. from fleas, ticks, mosquitoes, biting flies and lice
  • Kills fleas within 12 hours of application
  • Vet-recommended formula kills & repels on contact so fleas dont have to bite your dog to die
  • Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
  • No prescription needed

Description

K9 Advantix II Large Dog is the veterinarian-recommended formula that helps defend your dog against five pests: fleas, ticks, mosquitoes, biting flies and lice. And unlike other treatments, K9 Advantix II kills and repels fleas, ticks and mosquitoes. K9 Advantix II topical treatment gets straight to work killing fleas on dogs within 12 hours of initial application. This formula stops existing flea infestations and prevents new ones by killing adult fleas on contact so they canโ€™t lay eggs and they donโ€™t have to bite your dog to die. Fleas, ticks, mosquitoes and other pests not only cause discomfort; they may also transmit disease. Monthly use of K9 Advantix II is important to protect your dog against fleas that may cause transmission of tapeworms. This formula also kills fleas which may cause Flea Allergy Dermatitis and flea bite anemia. Thatโ€™s why K9 Advantix II Large Dog topical, spot-on formula makes application simple - going on in seconds. It's easier than a flea collar and there are no hard-to-swallow pills. Youโ€™ll also love that K9 Advantix II is fragrance-free and waterproof after 24 hours of application. Check the product label for information on application and potential side effects. K9 Advantix II pest protection is effective on both indoor and outdoor dogs. Your dog should be at least 7 weeks old and weigh 21-55 lbs. to use K9 Advantix II Large Dog. For the ultimate convenience in care, K9 Advantix II is available over the counter โ€“ no prescription needed. And, you can stock up with 2-dose, 4-dose and 6-dose packs so you never miss a monthly treatment. Once K9 Advantix II is applied, your dog is ready to get right back to big-pup cuddles and racing around the park. K9 Advantix II Large Dog is a trademark of Elanco or its affiliates.

Brand: K9 Advantix


Item Form: Topical


Scent: Unscented


Item Weight: 0.01 Ounces


Active Ingredients: Imidacloprid, Permethrin, Pyriproxyfen


Item Volume: 2.5 Milliliters


Allergen Information: Allergen-Free


Dog Breed Size: Large


Unit Count: 1 Count


Age Range (Description): 7 weeks and older


Product Dimensions โ€ : โ€Ž 4.25 x 0.88 x 4.75 inches; 0.01 ounces


Manufacturer recommended age โ€ : โ€Ž 1 month and up


Item model number โ€ : โ€Ž 90204385


Date First Available โ€ : โ€Ž March 13, 2019


Manufacturer โ€ : โ€Ž Elanco US Inc


Best Sellers Rank: #312 in Pet Supplies (See Top 100 in Pet Supplies) #5 in Dog Flea Drops


#5 in Dog Flea Drops:


Customer Reviews: 4.4 4.4 out of 5 stars (43,966)


Brand Name: K9 Advantix


Age Range Description: 7 weeks and older


UPC: 724089114938


Global Trade Identification Number: 38


Manufacturer Part Number: 90204385


Model Number: 90204385


Unit Count: 1 Count


Manufacturer: Elanco US Inc


Item Type Name: Topical


Item Form: Topical


Scent Name: Unscented


Dog Breed Size: Large


Pet Type: Dog


Target Species: Dog


Item Weight: 0.01 Ounces


Volume: 2.5 Milliliters


Allergen Information: Allergen-Free


Active Ingredients: Imidacloprid, Permethrin, Pyriproxyfen


Frequently asked questions

K9 Advantix II Large Dog Treatment is optimal for dogs weighing between 21-55 lbs. It is specifically designed to fit this weight range for effective flea, tick and mosquito prevention and treatment.

Each box of K9 Advantix II Large Dog Treatment provides a one-month supply. For ongoing protection, it is recommended to use the treatment once every month.

No, K9 Advantix II Large Dog Treatment is effective against fleas, ticks, and mosquitoes. It acts as a preventative measure to keep your pet from being infested with these pests, and can also treat existing infestations.

Yes, K9 Advantix II treatment is vet-recommended. It's a trusted choice among professionals for its effectiveness in preventing and treating flea, tick, and mosquito infestations in dogs.

Similar Products

Top Amazon Reviews

๐Ÿš€ Abunda's Overview

This is our summary and key points to consider based on customer reviews.

Based on the reviews, K9 Advantix appears to be an effective product for flea and tick prevention in dogs of all sizes. The majority of users reported a noticeable decrease in flea infestation soon after product application, and additional features such as its ability to repel mosquitoes make it even more appealing. The testimonials also suggest that it outperforms similar products in the market, such as Frontline.

Pros

  • ๐Ÿพ Works effectively against fleas, ticks and mosquitoes
  • ๐Ÿ˜Š Easy to apply and non-irritating to the pet's skin
  • ๐Ÿž๏ธ Suitable for outdoor pets and dogs in tick-infested areas
  • โœ… Has worked where other brands have failed

Cons

  • ๐Ÿ’Š Some pets might already be too infested for the treatment to work right away
  • โš ๏ธ Medicine must reach the skin to be effective
  • ๐Ÿงช It can potentially inflame "hot spots" on dogs

Should I Buy It?

Definitely. K9 Advantix appears to be a highly effective product for not only treating but also preventing flea and tick infestations in dogs. While it is necessary to apply the product correctly and pay attention to potential inflammation of "hot spots", these concerns are minor when compared to the product's demonstrated efficiency.

    • Worked well for Fluke
Size: 6 Pack
I recently moved from the cooler, mountainous region of SC to the warmer climate of middle GA to attend graduate school. I had been using Comfortis for two and half years on my dog, Fluke, without any problems. However, about two weeks ago, I felt a lump on her neck, and upon inspection, I discovered a tick. I began looking all over her body for more of these little pests, and found four more of them. Fortunately, Fluke is a rescue from a vet, and I don't have to bear the burden of expensive vet bills when something like this situation occurs. I was told that the Comfortis does not necessarily guard against ticks, and while it may have been effective in SC, the tick population in the heavily wooded river area in which I live now might be too much for the tablet to protect against for Fluke. I bought this product because it proffered to prevent ticks from attaching to the dog, and thus far, it has proven quite effective. Fluke, as her name suggests, is an unusual 25 pound lab/pit mixture. I purchased the product in the larger size because she is in between the medium and large dosing sizes, and I wanted to be sure that she had adequate protection. Fluke has been her usual happy self since I applied it to her. The directions indicated that you should apply in four to six spots on the dog, and I chose to apply to six, as to not have too high of a concentration in any area. I know that some people have reported having adverse reactions upon applying this product on their dogs, but I have noticed a trend in the reviews: most of the reviews are concerning smaller dogs. It might be that the formula is just too much for a smaller dog, but I'm not anywhere near an expert on the topic, just something that I have noticed. I am of the opinion that what it boils down to is this: all dogs are different, and what works well for one dog does not necessarily work well for others; the same could be said of medications for people, too. I'm just happy to have chosen a product that works well for Fluke. On another note, if you only need flea prevention, Comfortis is amazing, and much less messy than the topical products. While searching for more ticks, I never did find a flea on her! I hope that my review could be of some help, even though it is not very specific. UPDATE AS OF JULY 2013: I have brought home a 4 pound Pomeranian since my original post. I stand by what I stated in my previous post: this product works well for fleas, ticks, and mites in the warmer climate of middle Georgia in which I live. Barnaby, my little Pomeranian, has not had an adverse reaction to this medication, and Fluke, my lab/pit mixture, remains free of fleas and ticks, all the while not exhibiting any negative symptoms. For my little Pomeranian, I applied the medication to 4 separate places along his back, again to not have too high of a concentration in any one area. I purchased the smallest dose currently on the market, and although it was a little high for his small stature, it did not seem to phase him in any sort of negative ways. I wait, at a minimum, 72 hours before bathing my dogs, and I also do not bathe them for at least 5 days prior to application of the medication, as the oils within a dog's skin distribute the topical treatment. My dogs tolerate this medication well, and I have not found a flea or tick on either of them since I began using this product; however, I still will caution potential purchasers of this product: this product may not work well for your dog, just as some medications may not work well for you. Please, before you condemn the product as unsatisfactory, try to determine, and this may require the aid of a veterinarian, what your particular dog requires based upon breed, climate, and tolerance to topical flea prevention. I can only relate that this product works well for my larger dog and also my smaller dog within the area in which we currently live. Again, I hope that my update as to the effects of this product upon my smaller dog is helpful in your search for the right fit for your dog. ... show more
Reviewed in the United States on April 29, 2012 by A. Waldron
    • Advantix 2 works great. It truly repels as advertised especially the mosquitos ...
Size: 6 Pack
Advantix 2 works great. It truly repels as advertised especially the mosquitos which is good since those are the thing to worry about heartworm. Frontline is getting tolerant, I always have far better results from Advantix 2. For anyone looking for full 4 weeks of perfect coverage, it just doesn't exist. Any topical solution will weaken as you near the 4th week but I have found Advantix 2 to be GREAT. This is a great Seller and cannot beat the price. This is my second time purchasing from this seller on Amazon for price but also quality of product not sold nearing expiration. Expiration doesn't MEAN BAD it means Weaker. OK... SO! What about Irritated Skin!? Don't BUY IT if your worried about that! Some dogs are extra sensitive or ALLERGIC. DONT buy a topical solution if that is a huge concern. IT DOESN'T MAKE THIS A 1 STAR product because your dog is allergic or sensitive. For god sakes, you are putting poison on them and that includes in any brand unless your getting a prescription for a Pill. Then there are other possible side effects. Accept That. Anything you choose has Pro and Con's. My dog has sensitive Skin. She will get a little pink when I use ANY topical solution. However Advantix 2 is well known for being kinda strong. So how do I manage it for my Furbaby??? Easy. Take the time to put the solution on in several places. NOT JUST ONE BLOB, because you're too lazy. I skip the base of the tail. I never understood this. My dog can lick there all she wants. But I go from base of head at the back of the skull and ever couple inches I squirt a little down till I get between the shoulder blades and even so much as a little bit below that on her back. This helps spread it out and not irritate her and make her itchy. Then again, my pup has allergies and she's on Zyrtec daily. But when I use to not spread it out she would seem uncomfortable, now she is fine with it. She is just sticky for a day. A Con is Advantix 2 is a little greasier and you get More of it. But frontline barely gives any and never seems to work past 2 weeks. So take your pick! After a day, I brush her out and there is no more sticky. I wait a week instead of 48 hours to bath her. I don't notice any lack of flea control after a bathing. I really think this product works for anyone in areas where Frontline is losing its effectiveness. Also, heartworm is a billion dollar scare tactic. The idea of it is terrifying however, it is also expensive and for anyone struggling to spend that kind of money per month on their pup. Or those who are concerned with the drug's effect on the body long term, or those that are allergic. Advantix 2 has that added benefit of the mosquito repellent if you're religious in your re-applications. So... yeah. You're going to see pictures of Poor Pink or Red skin. Statistically, there will ALWAYS be a % of animals that have an allergic reaction to inactive ingredients. However, as an owner of a dog with skin problems. Just be smart about spreading out the application and don't go putting detergents on your dog "washing it clean" because their skin got a little pink or irritated. THAT is what worsens the situation. And I have gone through skin and fur issues with my pup to know this. My dog is allergic to the grass. I know skin irritation. Or should I say She Knows. ... show more
Reviewed in the United States on March 14, 2015 by Elle

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...