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ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY
ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH 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

ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY

4.5 stars

ADVANTAGE II MEDIUM ... see more >

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Returns Accepted

Current Bid

$7.99

1 Bidders
MSRP $50.98
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Advantage II Medium Dog is the vet-recommended prevention and treatment of flea and lice infestations in dogs. Advantage II Medium Dog flea treatment and prevention kills adult fleas, flea larvae and flea eggs to deliver total flea protection to your dog or puppy. In fact, within 12 hours of application, Advantage II Medium Dog topical treatment gets straight to work killing fleas through contact, so they don’t have to bite your dog to die. This 30-day treatment effectively breaks the flea life cycle, controlling existing flea and lice infestations and preventing further infestations all month long. Fleas not only cause discomfort; they can also pose other health risks. Monthly use of Advantage II Medium Dog is important to protect your dog against fleas that may cause transmission of tapeworms in dogs, Flea Allergy Dermatitis and flea bite anemia. That’s why Advantage II 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 Advantage II is fragrance-free and waterproof after 24 hours of application. Check the product label for information on application and potential side effects. Advantage II Medium Dog flea and lice protection is effective on both indoor and outdoor dogs. Your dog should be at least 7 weeks old and weigh 11 to 20 lbs. to use Advantage II Medium Dog. For the ultimate convenience in care, Advantage II Medium Dog is available over the counter – no prescription needed. And, you can stock up with a subscription for regular doorstep deliveries so you never miss a monthly treatment. Once Advantage II Medium Dog is applied, your dog is ready to get right back to exploring his favorite places – from the backyard to the dog park. Advantage II Medium Dog is a trademark of Elanco or its affiliates.


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Jake hancock
on May 13, 2026

​Finding an effective flea treatment for a large dog can be a challenge, but Advantage II has always been my go-to. This 4-month supply for dogs 55+ lbs is perfect for keeping my dog protected throughout the season. It’s easy to apply, waterproof, and I love that it kills fleas at all life stages—larvae and eggs included—so we don't have to deal with any re-infestations. My order was delivered right on time on May 8th, and it's such a relief to have peace of mind knowing he's covered. Highly recommend for any large breed owners!

Tyler
on May 8, 2026

This stuff works like magic a very well flea killer she is one happy dog!

H20FISH
on May 24, 2026

Excellent product

Tiffany
on March 16, 2026

This stuff used to work great but seems like now it doesn't work as good but still knocks them down a bit

Amazon Customer
on June 10, 2026

Great price and fast delivery! Thank you!

Hyraeth
on September 12, 2015

I've been using Advantage for flea control for several years, and Amazon is one of the best places to get it. You can't beat $10 a month for large dog flea protection. I also use one tube split into fifths (via syringe measurement) to give to my cats. Advantage II specifically is exactly the same product, in different dosages, for both dogs and cats. My 70-lb Lab gets a full 40 ml tube by herself, then the cats get 8 ml each and my brother-in-law's two ferrets get 4 ml each. I can cover 7 pets for $20 a month- a fantastic deal.The Advantage makes a noticeable difference in my pets' comfort- towards the end of the month, when it's wearing off, they begin to get itchy and uncomfortable. Once I reapply, that stops within a day or two, and they're happy and flea-free again all month.I have noticed that if our dog regularly gets into water (pool, beach, sprinklers), the Advantage wears off much quicker, despite claiming to be waterproof. That's understandable in a topical treatment, so we try to keep her out of water until the end of the application cycle, before a new treatment- then she gets to get wet to her heart's content!If you need to bathe your dog to kill fleas before applying, be sure to wait a day or two after the bath to give your dog's natural skin oils a chance to bounce back- it helps to distribute the medication.Be aware: this product is alcohol-based, and will evaporate quickly if left out in open air (we use a glass baby food jar to split the dosages in the syringe). It has also stripped the lacquer off the dining table when a few drops spilled while splitting doses, so try to avoid that too! Other than that, Advantage II is, in my opinion, the best topical flea control.

Shirley I Severns
on May 29, 2026

So far I haven't noticed any fleas. But it may not be time for them yet.

Amazon Customer
on June 12, 2026

Because the formula has not changed in 20 years or so, fleas have gained immunity to it, thus lasting 2 weeks rather than 4. Great product, but not suitable for indoor/outdoor pets unless you are willing to administer more often which in that case will work just fine.

  • Is Discontinued By Manufacturer

    No
  • Product Dimensions

    6.5 x 1 x 4.25 inches; 0.8 ounces
  • Item model number

    86336758
  • Department

    Racks/Futons
  • Date First Available

    March 5, 2011
  • Manufacturer

    Elanco US Inc
  • ASIN

    B004QREOYG
  • Best Sellers Rank

    See Top 100 in Pet Supplies
  • Brand

    Advantage
  • Item Form

    Topical
  • Scent

    Unscented
  • Item Weight

    0.05 Pounds
  • Active Ingredients

    Imidacloprid, Pyriproxyfen
  • Item Volume

    4 Milliliters
  • Allergen Information

    Allergen-Free
  • Dog Breed Size

    Medium
  • Unit Count

    4 Count
  • Age Range (Description)

    7 weeks and older
  • Brand Name

    Advantage
  • Age Range Description

    7 weeks and older
  • UPC

    724089202673 724089617231 724089378934
  • Global Trade Identification Number

    00724089202673, 00724089617231, 10724089367584
  • Manufacturer Part Number

    86336758
  • Model Number

    86336758
  • Included Components

    4
  • Warranty Description

    No_warranty
  • Item Type Name

    Topical
  • Scent Name

    Unscented
  • Target Species

    Dog
  • Volume

    4 Milliliters
  • GTIN

    724089202673 724089617231 724089378934
  • Recent Sales

    800+ 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.

The buyer acknowledges that these terms, along with other terms outlined below, can only be amended or revised in writing, signed by the auctioneer. Any representations made by Korting or its agents do not alter these “as is, where is with all faults” terms. Descriptions provided on products or through advertising, including condition labels such as “New,” are not guaranteed, and buyers rely solely on their own inspection. While information in sale advertising is believed to be accurate, Korting assumes no responsibility for errors or omissions.

Auction Closing Times

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.

Payment

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.

ADVANTAGE II MEDIUM DOG VET-RECOMMENDED FLEA TREATMENT & PREVENTION | DOGS 11-20 LBS. | 4-MONTH SUPPLY