Advantage II for Dogs 21-55 Lbs. 6 Pack

With over 20 years in the pet and veterinary business, we offer top quality veterinary products at a great price. We know how important your pets are to you, and we want to help keep them happy and healthy.

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Hours: Monday-Friday 9:00 AM-5:00 PM CST

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For customer service inquiries or to initiate a return, please contact NoFleasUSA or American Flea Products at or (512) 916-4494.

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You can initiate a return for new and unopened items within 15 days of delivery for a refund. To qualify for a refund, items must be in new and unused condition with all original materials and/or accessories. If a return is not received at our processing facility within 30 days, it may be subject to a partial refund. You will be responsible for return shipping costs. However, if the return is a result of a fulfillment error, product defect, or damage incurred during shipping, we will refund the full cost of the merchandise. We will provide a pre-paid return shipping label for Non-Buyer's Remorse returns. All returns are subject to inspection, and if found not to be an error on our part, the return shipping costs will be withheld from your refund.

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ITEM# 24236917
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    ITEM#: 24236917

    Advantage® II for Dogs 21-55 Lbs.
    Advantage® II is a once-a-month topical flea preventive for dogs or cats.
    Fight the misery of biting fleas.
    For use on:
    Advantage® II for dogs is for use only on dogs and puppies 7 weeks of age and older and weighing 21 lbs. or more.
    • Advantage® II kills fleas through contact. Fleas do not have to bite your dog to die.
    • Provides multi-stage flea control effectively breaking the flea life cycle.
    • Kills fleas within 12 hours of application. Kills reinfesting fleas within 2 hours.
    • Convenient, once-a-month topical application.
    • Waterproof. A soap free shampoo is recommended for bathing.
    • Lasts for one month.
    • Veterinarian recommended.
    How It Works
    Advantage® II uses two active ingredients for flea prevention and treatment. Imidacloprid, an adulticide, kills adult fleas on the animal. The insect growth regulator pyriproxyfen inhibits development of immature stages, effectively breaking the flea life cycle.

    While we aim to supply accurate product information, it is sourced by manufacturers, suppliers and marketplace sellers, and has not been provided by Overstock.


    Model Number For 21-55 lbs. 6 Pack
    Country of Origin Germany
    • Verified Purchase

      eith warmer weather comes fleas even if your pets are indoors. I have been using this product for a few years now and never have any issues with fleas. It is very easy to open and apply. Each dose is individually wrapped and they are in little tubes. I’ve tried many different brands and swear by this one.

    • Advantage ll FOR dogs
      Verified Purchase

      This is the best product on the market for the prevention of all stages of the life of the flea. It starts working the minute it is applied. I have experienced No Side Effects with my pet. Just, no more fleas. I would recommend this product.

    • Verified Purchase

      Fantastic flea control product. Easy to use.

    • Verified Purchase

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    Shipping & Returns

    Sold and Shipped by NoFleasUSA or American Flea Products, An Overstock Marketplace Seller

    With over 20 years in the pet and veterinary business, we offer top quality veterinary products at a great price. We know how important your pets are to you, and we want to help keep them happy and healthy.

    Contact Information

    Hours: Monday-Friday 9:00 AM-5:00 PM CST


    Usually leaves our warehouse in 1 business day. *

    Shipping Information:

    Our standard shipping method is ground shipping. We also offer expedited shipping for most items. Your final shipping cost and estimated delivery timeframe will be available at checkout.
    Standard shipping details
    Expedited shipping details

    Standard Return Policy:

    Items must be returned in new or unused condition and contain all original materials included with the shipment. For the return policy on a Marketplace item, please refer to the Seller’s individual policy, located on the product page by clicking on the Seller name. More Details

    FINAL SALE EXCLUSION: Items marked as FINAL SALE are not returnable unless the problem you experience is the result of our error.

    For your protection, all orders are screened for security purposes. If your order is selected for review, our Loss Prevention Team may contact you by phone or email. There may be a two business day delay to process your order.

    ** Most Oversize orders are delivered within 1-4 weeks. Some orders may take 6 weeks to be delivered.