--- product_id: 255854838 title: "K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply" brand: "k9 advantix" price: "¥11872" currency: JPY in_stock: true reviews_count: 7 category: "K9 Advantix" url: https://www.desertcart.jp/products/255854838-k9-advantix-ii-large-dog-vet-recommended-flea-tick-mosquito store_origin: JP region: Japan --- # For dogs 21-55 lbs Waterproof after 24 hours Kills fleas in 12 hours K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply **Brand:** k9 advantix **Price:** ¥11872 **Availability:** ✅ In Stock ## Summary > 🐾 Stay ahead of pests, keep your best friend unstoppable! ## Quick Answers - **What is this?** K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply by k9 advantix - **How much does it cost?** ¥11872 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/255854838-k9-advantix-ii-large-dog-vet-recommended-flea-tick-mosquito) ## Best For - k9 advantix enthusiasts ## Why This Product - Trusted k9 advantix brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Multi-Pest Defense:** Repels and kills fleas, ticks, mosquitoes, biting flies, and lice on contact. - • **All-Weather Protection:** Waterproof formula ensures continuous defense even after a swim or rain. - • **Effortless Application:** Fragrance-free, easy-to-apply topical treatment—no prescription needed. - • **Rapid Flea Elimination:** Kills fleas within 12 hours to keep your dog itch-free and happy. - • **Vet-Recommended & Trusted:** Clinically proven, vet-approved formula trusted by millions of dog owners. ## Overview K9 Advantix II Large Dog is a vet-recommended, fast-acting topical treatment designed for dogs weighing 21-55 lbs. It kills fleas within 12 hours and provides waterproof protection against fleas, ticks, mosquitoes, biting flies, and lice for up to 30 days per dose. This fragrance-free, easy-to-apply formula requires no prescription and comes in a convenient 4-month supply. ## Description K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply : desertcart.ae: Pet Supplies Review: السعر مرتفع مقارنة في جودة المنتج - السعر مرتفع مقارنة في جودة المنتج Review: Taste is bad - My dog vomited when he tested the medicine and I had to throw it away in the garbage ## 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 don’t have to bite your dog to die - Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours - No prescription needed ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004QMX4YW | | Active Ingredients | Imidacloprid, Permethrin, Pyriproxyfen | | Age Range Description | 7 weeks and older | | Allergen Information | Allergen-Free | | Best Sellers Rank | #18,728 in Pet Supplies ( See Top 100 in Pet Supplies ) #31 in Dog Flea Drops | | Brand | K9 Advantix | | Brand Name | K9 Advantix | | Customer Reviews | 4.4 out of 5 stars 25,725 Reviews | | Dog Breed Size | Large | | Global Trade Identification Number | 00724089203991 | | Included Components | 4 | | Item Form | Drops | | Item Type Name | Topical | | Item Weight | 0.02 Pounds | | Item form | Drops | | Item volume | 10 Milliliters | | Item weight | 0.02 Pounds | | Manufacturer | K9 Advantix | | Manufacturer Part Number | 710546030004 | | Model Number | 86315041 | | Scent | Unscented | | Scent Name | Unscented | | Target Species | Dog | | UPC | 724089203991 | | Unit Count | 1 Count | | Volume | 10 Milliliters | ## Product Details - **Active Ingredients:** Imidacloprid, Permethrin, Pyriproxyfen - **Brand:** K9 Advantix - **Item form:** Topical - **Item weight:** 0.02 Pounds - **Scent:** Unscented ## Images ![K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply - Image 1](https://m.media-amazon.com/images/I/71U+2ITgYeL.jpg) ![K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply - Image 2](https://m.media-amazon.com/images/I/91u1EnRiz2L.jpg) ![K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply - Image 3](https://m.media-amazon.com/images/I/81lc7ZPFGHL.jpg) ![K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply - Image 4](https://m.media-amazon.com/images/I/81ffnFEbBPL.jpg) ![K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply - Image 5](https://m.media-amazon.com/images/I/71Bs7yQ8ocL.jpg) ## Questions & Answers **Q: I am thinking about ordering a 6 pack which some would be kept for next year. How do I know what the date is on the product?** A: I looked everywhere on the individual package of the tubes and the box, there is nothing that mentions an expiration or use by date. There are phone numbers to call for questions...1-800-255-6826. Looking at how the tubes are packaged, my best guess would be that as long as they are sealed properly and not opened you could probably use unopened tubes at a later time. I have 2 dogs and ordered the six pack myself, if I don't use give my girls all 3 of their doses this year I will probably use it up next summer then. **Q: What is the expiration date on this $41 product currently for sale???** A: The expiration date is usually stamped into the package. And $41 is very good price for k9 Advantix II. It's often quite more expensive from your vet or other sites. **Q: Is this safe for sight hounds and/or dogs over the age of 12? Thank you for taking time to answer.** A: Yes, there should be no issue when using on a sight hound. I use this on my Brittney with no issues. Be advised this does not " repel" ticks. Ticks will still get onto your dog and can/will bite however, the tick will be impaired/ killed over a few hours time after biting. When used with a organic spray for Ticks you should have no issues. I have never had a flea on my dog nor my 2 cats. I recommend this product fully. Be sure to match your dog's weight with the correct Advantix. **Q: Does it send all 6 doses at a time?** A: When you order a 6 pack that means 6 doses. IF you order a 3 or 4 pack. it is that many doses respectively. ## Customer Reviews ### ⭐⭐⭐ السعر مرتفع مقارنة في جودة المنتج *by A***R on 31 January 2024* السعر مرتفع مقارنة في جودة المنتج ### ⭐⭐ Taste is bad *by R***K on 5 May 2026* My dog vomited when he tested the medicine and I had to throw it away in the garbage ### ⭐⭐⭐⭐ SIZE MATTERS!!! *by S***4 on 8 August 2023* I purchased the “Large Dog” size for a 30 pound dog. This should have, IMHO, provided more than adequate coverage for the flea problem he has - but it’s been ~2 weeks and he is still barking at his butt. After some research, I learned that you MUST MAKE SURE that the medicine reaches the SKIN, not just the bottom of the fur next to the skin. And - if your treating a dog with “hot spots” - you may want to hold off and see your vet first because this medicine CAN - not always, but has the potential to further inflame these “hot spots” that itch so badly. Finally, always make sure you apply these drops every month on the same day of the month. And please don’t wait until the poor pooch is so irritated by the fleas that they become difficult to treat. Like my grandmother always said, “an ounce of prevention is worth a pound of cure” and with the heat bearing down on the USA this year, the fleas are out taking a bite out of every unprotected animal out there! Make sure you purchase the correct size for your dog, and if you have an animal that is closer to the heavier side, I’d recommend ordering the next size up, but always ask your vet when in doubt. It’s a good product all in all, but fleas are a problem best resolved sooner, not later. Good luck! ## Frequently Bought Together - K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21 - 55 lbs. | 4-Mo Supply - K9 Advantix II XL Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 lbs. | 4-Mo Supply - K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 4-Mo Supply --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/255854838-k9-advantix-ii-large-dog-vet-recommended-flea-tick-mosquito](https://www.desertcart.jp/products/255854838-k9-advantix-ii-large-dog-vet-recommended-flea-tick-mosquito) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-04*