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K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY
K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY

CONDITION: New

Item is brand new and factory sealed in original packaging. Contents have not been opened or used.

Returns Accepted

We accept returns under specific cicumstances.
See return policy for details

K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY

4.4 stars

K9 ADVANTIX II MEDIU... see more >

New
Returns Accepted

Current Bid

$15.99

3 Bidders
MSRP $77.61
Bidding has ended. Bidding has ended

This auction has ended.


K9 Advantix II Medium 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 can’t lay eggs and they don’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. That’s why K9 Advantix II Medium 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. You’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 11-20 lbs. to use K9 Advantix II Medium Dog. For the ultimate convenience in care, K9 Advantix II is available over the counter – 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 Medium Dog is a trademark of Elanco or its affiliates.


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Vincent
on September 16, 2025

Cannot recommend enough! I live in the middle of the mountains next to a large national forest. There's deer, beer, turkey and all sorts of wildlife moving through my yard and in the woods year round, visibly agitated by fleas.My dog of 14 years finally got fleas (she's an inside dog with lots of outdoor playtime), as I've been thorough with checking her fur during brushings and baths. I usually just give her monthly flea baths which sufficed, but after a neighbor clear cut their property I've had an influx of wildlife on my property and I think that contributed to my dog getting fleas, I'm not sure.Regardless, she had fleas and they became an irritating presence within my home. Unfortunately, there's plenty of carpet for them to hide in and lay eggs. Yuck!I tried everything to get rid of them! Carpet powders, flea baths (different brands), furniture spray, cheap flea drops.. nothing worked. I battled with them for almost 6 months!! My poor dog was waking up constantly scratching and pacing back and forth throughout the house. I felt like an awful parent and was going crazy before finally deciding to look into the more expensive options..Now, considering how much I spent on cheaper alternatives that didn't work or get rid of the problem at the source, I really wish I would've went straight for the higher priced option first. Within a matter of weeks of using this product I saw a quick decline in fleas inside the house and on my dog. Within one to two months, they were completely gone! I was in complete shock.I cannot praise this product enough. Maybe it's so effective on the fleas in my area since I live in the rural countryside where they're not used to it, as opposed to city fleas, so your mileage may vary. But for me this was a miracle product and I will be using this as a preventive measure in the summer months, with a periodic dose in the winter.If you struggled with fleas for months and months like I have, you will know the complete relief that comes with a flea-free home. Don't skimp! It may be more expensive than the alternatives but trust me with I say I tried all of them and nothing came close to getting rid of them, whereas this treatment was so fast and effective I was left nearly crying when I saw my sweet dog sleeping soundly through the night. :)

a customer
on July 23, 2025

We have fought fleas on all fronts in our hot and muggy rural area. Frontline and the generic version- useless. Sprayed the land, treated our home, sprayed our dog with an additional temporary spray. This is the first time we've ever had such problems. Dog was constantly scratching, visible fleas and flea dirt. Flea comb simply full of mature fleas and flea dirt. Two vet visits in which we were told the next step was a yearly and expensive treatment. Thankfully, found this on Google as vet recommended. Bought a dose here.It arrived yesterday and we immediately applied as directed to 15 lb dog. He was fine upon application. No major problems afterwards but did began to claw himself aggressively and nip at his paws. Found those relatively minor results on the carton safety data and saw no reason to be overly concerned. I did give him the dose of antihistamine as prescribed by our vet. I think the fleas were 'abandoning ship'! He became drowsy within about 40 minutes settled down and slept soundly all night. No raw spots or other problems today but he looks like a newer, improved dog today. He is basically white. Today there were no visible fleas or flea dirt. Yes! So glad we found this product, all I will buy again! Great customer support because I called the # on the product box today just to check his reaction. They were great.

2Drinkwaters
on February 13, 2014

I live on the Gulf Coast. Mosquitos are a big part of life here and that is one of the main reasons I chose Advantix and stick with it. It repels and kills mosquitos. I have a miniature schnauzer, so her belly is pretty low to the ground and they love to lunch on her. This does the trick.As far as fleas: Never have had a one and fleas are terrible here. Never. Not. Once. I usually buy an entire year at a time so I'm never without because if you stop treatment, those fleas will find you. Biting flies, repels those too.Now we're on to ticks. I'll be honest, this does nothing for my dog and ticks. I do have a fenced in very small yard in the middle of downtown. There are no ticks here, so it's not a worry for me. When I first took her hiking is when I realized Advantix must be candy for ticks. She was covered. It didn't repel and it didn't kill them. I talked to the vet about it she said that others had said that about Advantix and she recommended I switch. I didn't want to because of the mosquitos so she told me about Virbac Preventic tick collar when we go hiking. I came home, went straight here and bought a 2 pack. It's not cheap but I tell you it works. Went camping and a few ticks were brave enough to jump on her but they struggled; they couldn't get a hold of her and they started getting weird and just fell off. None attached and only 3 tried it. So if you have a tick issues give that a try but as for Advantix and fleas/mosquitos/flies, just do it. Your furbaby will thank you.

Ashlee C.
on April 29, 2026

After nexguard plus was found to be causing my frenchie liver and pancreatic issues for almost two years, I decided to try this instead. Caused skin burns on my 27lb frenchie... got the smaller breed dose after that and monitored his skin closely after and it was fine. Just beware and watch their skin after application when the weight is close between doses. I went by the weight for the dose and the smaller breed dose did not cause the burns and is still effective treatment.

Stickers
on June 4, 2026

Cost is worth it. No more fleas.

Barbara
on May 23, 2026

Best product! I have a few dogs and I have tried many different things and this is the only thing that works. Thank you

Ms. V
on January 16, 2026

Effectiveness, maybe 60%. Our dog is an indoor dog that we walk for potty breaks. The area surrounding our home is sprayed by a pest control service. I will not buy this product again.

Tracie
on April 4, 2026

Fast delivery same price as all other retailersIt may dry your dogs skin out and they will scat h where you applied flea medsBut it does work great otherwise

Sweetie_04
on June 10, 2018

En la caja vienen 6 pipetas, como se indica en la descripción: 4 de ellas vienen en el sobre hermético de la propia caja y las otras 2 vienen sueltas (la caja realmente es de 4).Contenta con la calidad de Advantix, no me arriesgo a probar con otra marca.Muy recomendado por la relación calidad-precio.

Patri
on November 8, 2020

Recomendable

Amazon Customer
on January 31, 2024

السعر مرتفع مقارنة في جودة المنتج

Jorge Rodríguez
on April 24, 2019

Llego en la fecha comprometida. Aparte traia un pequeño detalle, que es de agradecer, con unas chuches para el rey de la casa, para que el "trago" de la desparasitazación sea más dulce.

  • Is Discontinued By Manufacturer

    No
  • Product Dimensions

    7.9 x 5 x 2.3 inches; 1.76 ounces
  • Item model number

    86315122
  • Date First Available

    October 5, 2004
  • Manufacturer

    Elanco US Inc
  • ASIN

    B004QN0LYW
  • Best Sellers Rank

    See Top 100 in Pet Supplies
  • Brand

    K9 Advantix
  • Item Form

    Topical
  • Scent

    Unscented
  • Item Weight

    1.76 ounces
  • Active Ingredients

    Imidacloprid, Permethrin, Pyriproxyfen
  • Item Volume

    6 Milliliters
  • Allergen Information

    Allergen-Free
  • Dog Breed Size

    Medium
  • Unit Count

    6 Count
  • Age Range (Description)

    7 weeks and older
  • Brand Name

    K9 Advantix
  • Age Range Description

    7 weeks and older
  • UPC

    724089203809
  • Global Trade Identification Number

    00724089203809
  • Manufacturer Part Number

    86315122
  • Model Number

    86315122
  • Included Components

    6 MONTH K9 Advantix II TEAL for Medium Dogs (11-20 lbs)
  • Warranty Description

    Available from manufacturer upon request
  • Item Type Name

    Topical
  • Scent Name

    Unscented
  • Pet Type

    Dog
  • Target Species

    Dog
  • Volume

    6 Milliliters
  • GTIN

    724089203809
  • Recent Sales

    2K+ bought in past month

Buyer’s Premium

A 15% buyer’s premium will be added to the sale price of all purchases.

Store Auction Lots Condition

All items are uninspected and the condition is unknown unless otherwise explicitly stated. Items labeled as “New” are believed to be unused and in original manufacturer packaging; however, packaging may show signs of storage or handling, and items are not tested unless specifically noted. Individual items are available for inspection at Korting Outlet located at 159 1st Court, Grand Rapids, Michigan 49534 during store hours.

The highest bids serve as legally binding contracts, and all sales are considered final. Items are sold on an “as is” basis, without any guarantees, warranties, or the possibility of refunds, whether written, expressed, or implied. The operational condition of an item may not be known or listed in the item description. While we may provide information on the condition of some items, including items marked as “New,” such information is not guaranteed.

All items are sold with all faults and without any warranty, whether expressed or implied, regarding merchantability or fitness for a particular purpose. The sale is conducted on an “as is, where is” basis with all faults. Buyers are strongly encouraged to physically inspect items before placing bids during the inspection period. Once submitted, bids cannot be withdrawn before, during, or after the auction for any reason.

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Posted closing times are in Eastern Time and may be extended through dynamic bidding. Dynamic bidding extends the auction close time until there are five minutes without bidding activity. Korting reserves the right to close early or extend auctions at its discretion.

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Payments will be processed through Stripe.

Refund Policy

Due to the nature of liquidation merchandise, returns are accepted only under the following circumstances:

  • Wrong item received
  • Major undisclosed damage that significantly affects functionality or value
  • Item arrives nonfunctional or dead on arrival (unless listed as untested, for parts, or salvage)
  • Missing critical components necessary for basic operation that were not disclosed in the listing
  • Counterfeit items or items materially different from the listing description

The following conditions are not eligible for return or refund:

  • Buyer’s remorse or accidental purchases
  • Minor cosmetic wear, scratches, dents, scuffs, or signs of prior handling
  • Damaged, worn, or missing retail packaging
  • Compatibility issues with buyer equipment, software, or intended use
  • Missing non-essential accessories, manuals, inserts, cables, or packaging materials unless specifically stated in the listing

All return requests must be submitted within 72 hours of delivery and include clear photos and/or video documentation of the issue. We reserve the right to deny returns that do not meet the above criteria.

Sales Tax

All orders are subject to the 6% Michigan sales tax. Tax-exempt buyers must have a current tax-exempt certificate on file before sales tax can be removed from an invoice.

Failure to Pay or Remove Items

Korting reserves the right to charge a 15% non-refundable restocking fee for items not paid for and picked up within seven days of the auction closing. Such items will be considered abandoned and forfeited to Korting. Korting may resell any abandoned or forfeited items.

K9 ADVANTIX II MEDIUM DOG VET-RECOMMENDED FLEA, TICK & MOSQUITO TREATMENT & PREVENTION | DOGS 11-20 LBS. | 6-MO SUPPLY