--- product_id: 345338753 title: "Bayer K9 Advantix II Flea, Tick and Mosquito Prevention for Large Dogs, 21-55 lbs" brand: "k9 advantix" price: "S$195" currency: SGD in_stock: true category: "K9 Advantix" url: https://www.desertcart.sg/products/345338753-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-large store_origin: SG region: Singapore --- # Waterproof after 24 hours Protects for 30 days per dose Kills fleas in 12 hours Bayer K9 Advantix II Flea, Tick and Mosquito Prevention for Large Dogs, 21-55 lbs **Brand:** k9 advantix **Price:** S$195 **Availability:** ✅ In Stock ## Summary > 🐾 Stay bite-free, stress-free—because your dog deserves the best! ## Quick Answers - **What is this?** Bayer K9 Advantix II Flea, Tick and Mosquito Prevention for Large Dogs, 21-55 lbs by k9 advantix - **How much does it cost?** S$195 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/345338753-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-large) ## 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 - • **Rapid Action Defense:** Starts killing fleas within 12 hours—no more waiting around! - • **Broad-Spectrum Shield:** Repels and kills fleas, ticks, AND mosquitoes—triple threat coverage. - • **All-Weather Protection:** Waterproof formula keeps working even after baths or swims. - • **Easy Topical Application:** Simple, mess-free monthly treatment designed for busy dog parents. - • **Vet-Recommended Reliability:** Trusted by professionals for year-round protection on large dogs. ## Overview Bayer K9 Advantix II offers a 6-month supply of topical flea, tick, and mosquito prevention for large dogs (21-55 lbs). It kills pests on contact within 12 hours, remains waterproof after 24 hours, and provides continuous protection for 30 days per application. This vet-recommended formula is easy to apply, allergen-free, and designed for year-round use, ensuring your dog stays protected without the pain of bites. ## Description The 6-pack of Bayer K9 Advantix II flea and tick prevention for large dogs is a broad-spectrum, veterinarian-recommended dog flea and tick prevention that also kills and repels mosquitoes, a benefit not found in many other flea and tick products. Some products require a flea or tick to bite your dog in order to work, but K9 Advantix II flea and tick prevention for dogs is a topical formula that works through contact, so your dog doesn’t have to endure a painful bite for the flea, tick or mosquito to die. Just one application of Bayer K9 Advantix II flea and tick prevention for large dogs starts working to kill fleas within 12 hours, is waterproof after 24 hours, and continues to work to kill fleas, ticks and mosquitoes for up to 30 days, even after a bath or swimming. We recommend the use of a grooming shampoo designed specifically for pets. Do not use K9 Advantix II on cats. Use only on dogs. ## Features - 6 monthly applications of K9 Advantix II flea and tick prevention for large dogs weighing 21-55 pounds - K9 Advantix II flea and tick prevention for dogs works through contact, so fleas, ticks and mosquitoes do not have to bite your dog to die - K9 Advantix II flea and tick control for dogs is an easy to apply topical formula - Starts working to kill fleas within 12 hours and keeps working for 30 days - Suitable for effective year-round dog flea and tick treatment for large dogs ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004QN0M2S | | Active Ingredients | Imidacloprid, Permethrin, Pyriproxyfen | | Age Range Description | 7 weeks and older | | Allergen Information | Allergen-Free | | Best Sellers Rank | #57,104 in Pet Supplies ( See Top 100 in Pet Supplies ) #65 in Dog Flea Drops | | Brand Name | K9 Advantix | | Customer Reviews | 4.6 4.6 out of 5 stars (11,376) | | Global Trade Identification Number | 00724089204028 | | Item Form | Topical | | Item Weight | 0.02 Pounds | | Manufacturer | K9 Advantix | | Manufacturer Part Number | 86315092 | | Model Number | 86315092 | | Scent Name | Unscented | | Target Species | Cat, Dog | | UPC | 724089204028 | | Unit Count | 6 Count | | Volume | 1 Quarts | ## Product Details - **Active Ingredients:** Imidacloprid, Permethrin, Pyriproxyfen - **Brand:** K9 Advantix - **Item form:** Topical - **Item weight:** 0.02 Pounds - **Scent:** Unscented ## Images ![Bayer K9 Advantix II Flea, Tick and Mosquito Prevention for Large Dogs, 21-55 lbs - Image 1](https://m.media-amazon.com/images/I/71wsnDhKyPL.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. ## Frequently Bought Together - K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21 - 55 lbs. | 6-Mo Supply - K9 Advantix II XL Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 lbs. | 6-Mo Supply - K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 6-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.sg/products/345338753-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-large](https://www.desertcart.sg/products/345338753-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-large) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-10*