---
product_id: 6149962
title: "K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 2-Mo Supply"
brand: "k9 advantix"
price: "9613 kr"
currency: ISK
in_stock: true
reviews_count: 12
category: "K9 Advantix"
url: https://www.desertcart.is/products/6149962-k9-advantix-ii-medium-dog-vet-recommended-flea-tick-mosquito
store_origin: IS
region: Iceland
---

# For dogs 11-20 lbs Waterproof after 24 hours Kills fleas in 12 hours K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 2-Mo Supply

**Brand:** k9 advantix
**Price:** 9613 kr
**Availability:** ✅ In Stock

## Summary

> 🐾 Stay ahead of pests, keep your pup unstoppable!

## Quick Answers

- **What is this?** K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 2-Mo Supply by k9 advantix
- **How much does it cost?** 9613 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/6149962-k9-advantix-ii-medium-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

- • **Effortless Application:** Fragrance-free, topical treatment applied in seconds—no pills or collars needed
- • **No Prescription Hassle:** Available over-the-counter so your dog stays protected without the vet visit
- • **Rapid Flea Elimination:** Kills fleas within 12 hours to stop infestations fast
- • **All-in-One Pest Defense:** Vet-recommended formula repels & kills fleas, ticks, mosquitoes, biting flies, and lice
- • **Long-Lasting Protection:** Waterproof after 24 hours and effective for a full month of continuous defense

## Overview

K9 Advantix II Medium Dog is a vet-recommended, fast-acting topical treatment designed for dogs weighing 11-20 lbs. It kills and repels fleas, ticks, mosquitoes, biting flies, and lice within 12 hours, providing a full month of waterproof protection. Easy to apply and fragrance-free, this formula requires no prescription and keeps your dog comfortable and pest-free indoors and outdoors.

## Description

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.

Review: Bye-Bye Bugs, Hello Happy Pup 🐾🛡️ - K9 Advantix II keeps fleas, ticks, and mosquitoes far away from my small dogs. Easy to apply, vet-recommended, and works fast — no more itchy, grumpy pups. Peace of mind for me, tail wags for them. Highly recommend if you want a pest-free pooch.
Review: I use this and it works for all 6 of my dogs. - I have used this for years. You apply to their back. It is easy to use and not messy. My dogs have not gotten fleas or any other bites. I will continue to use. It works well and lasts for the month if not longer. The dogs do not notice it on them. Do not scratch or try to lick it. Great for the price. I have not noticed any side effects.

## Features

- K9 Advantix II Medium Dog 30-day treatment & prevention protects dogs 11-20 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 | B00I2266Y2 |
| ASIN  | B00I2266Y2 |
| Age Range Description | 7 weeks and older |
| Best Sellers Rank | #961 in Pet Supplies ( See Top 100 in Pet Supplies ) #6 in Dog Flea Drops |
| Brand Name | K9 Advantix |
| Breed Recommendation | Medium |
| Color | Medium Dog only |
| Country of Origin | Germany |
| Customer Reviews | 4.4 4.4 out of 5 stars (33,354) |
| Date First Available | January 26, 2014 |
| Date First Available  | January 26, 2014 |
| Department | Flea & Tick |
| Department  | Flea & Tick |
| Directions | Application Instructions: 1. Use only on dogs. DO NOT USE ON CATS or other animals. 2. The dog should be standing for easy application. Evenly apply the entire contents of the K9 Advantix® II tube to two or three spots on the top of the back from the shoulder to the base of the tail. 3. At each spot, part the hair until the skin is visible. 4. Place the tip of the tube on the skin and gently squee… |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 1 x 4.38 x 4.75 inches |
| Item Package Dimensions L x W x H | 4.72 x 4.37 x 0.94 inches |
| Item Weight | 0.32 Ounces |
| Item model number | 86314991 |
| Item model number  | 86314991 |
| Manufacturer | Elanco US Inc |
| Manufacturer  | Elanco US Inc |
| Model Name | K9 Advantix II |
| Number of Items | 1 |
| Product Dimensions  | 1 x 4.38 x 4.75 inches; 0.32 ounces |
| Size | 2 Pack |
| Specific Uses for Product | Parasites |
| Style | Medium Dog Only |
| Target Audience Keyword | dogs |

## Product Details

- **Active Ingredients:** Imidacloprid, Permethrin, Pyriproxyfen
- **Age Range (Description):** 7 weeks and older
- **Allergen Information:** Allergen-Free
- **Brand:** K9 Advantix
- **Dog Breed Size:** Medium
- **Item Form:** Topical
- **Item Volume:** 2 Milliliters
- **Item Weight:** 0.32 Ounces
- **Scent:** Unscented
- **UPC:** 724089060631

## Images

![K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 2-Mo Supply - Image 1](https://m.media-amazon.com/images/I/71VIzeRO-YL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: does this work on mosquitos**
A: Yes! It will keep the fleas off the mosquito. But at the same time, it will kill the mosquito. Use only on dogs from 11-20 lbs.

**Q: Does Amazon assure that these medicines are not expired or tampered?  Is the supplier veterinarian approved?**
A: Yes,  Piccardmeds4pets Corp was created by a Veterinarian Professional, with over 20 years of experience in the field. We have partner with major distributors to bring you not only the best the best prices, but quality and fresh product.

**Q: can i give my dog a bath**
A: Its best to wait a few days before bathing your pet. It gives the medicine time to soak into the skin and do what its designed to do best.

**Q: how long after a bath can I put this on my dog?**
A: Go ahead and put the drops on your dog immediately after bathing.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bye-Bye Bugs, Hello Happy Pup 🐾🛡️
*by S***P on December 24, 2025*

K9 Advantix II keeps fleas, ticks, and mosquitoes far away from my small dogs. Easy to apply, vet-recommended, and works fast — no more itchy, grumpy pups. Peace of mind for me, tail wags for them. Highly recommend if you want a pest-free pooch.

### ⭐⭐⭐⭐⭐ I use this and it works for all 6 of my dogs.
*by L***Z on January 27, 2026*

I have used this for years. You apply to their back. It is easy to use and not messy. My dogs have not gotten fleas or any other bites. I will continue to use. It works well and lasts for the month if not longer. The dogs do not notice it on them. Do not scratch or try to lick it. Great for the price. I have not noticed any side effects.

### ⭐⭐⭐⭐⭐ Does not kill fleas
*by M***R on January 26, 2026*

I have used these for years and the last 3 months supply has been a disappointment they are not killing the fleas at all. My babies still have fleas crawling all over them after application. I will no loner be buying this product.

## Frequently Bought Together

- K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 2-Mo Supply
- K9 Advantix II XL Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 lbs. | 2-Mo Supply
- K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 2-Mo Supply (Packaging may vary)

---

## 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.is/products/6149962-k9-advantix-ii-medium-dog-vet-recommended-flea-tick-mosquito](https://www.desertcart.is/products/6149962-k9-advantix-ii-medium-dog-vet-recommended-flea-tick-mosquito)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-10*