---
product_id: 254644755
title: "Bayer K9 Advantix II Flea, Tick & Mosquito Prevention for Medium Dogs, 11-20 lbs"
brand: "k9 advantix"
price: "VT20187"
currency: VUV
in_stock: true
reviews_count: 5
category: "K9 Advantix"
url: https://www.desertcart.vu/products/254644755-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-medium
store_origin: VU
region: Vanuatu
---

# Starts killing fleas in 12 hours Waterproof after 24 hours 2 months of continuous protection Bayer K9 Advantix II Flea, Tick & Mosquito Prevention for Medium Dogs, 11-20 lbs

**Brand:** k9 advantix
**Price:** VT20187
**Availability:** ✅ In Stock

## Summary

> 🐕‍🦺 Stay ahead of pests, keep your pup unstoppable!

## Quick Answers

- **What is this?** Bayer K9 Advantix II Flea, Tick & Mosquito Prevention for Medium Dogs, 11-20 lbs by k9 advantix
- **How much does it cost?** VT20187 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/254644755-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-medium)

## 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

- • **Triple Pest Shield:** Repels and kills fleas, ticks, mosquitoes & more on contact
- • **Rapid Action Defense:** Kills fleas within 12 hours to stop infestations fast
- • **Year-Round Protection:** Effective all year for indoor & outdoor medium dogs (11-20 lbs)
- • **Effortless Application:** Topical drops applied in seconds—no pills or collars needed
- • **Waterproof & Fragrance-Free:** Keeps working through water exposure without any scent

## Overview

K9 Advantix II for medium dogs (11-20 lbs) delivers fast-acting, 2-month topical protection against fleas, ticks, mosquitoes, biting flies, and lice. Starting to kill fleas within 12 hours, this waterproof, fragrance-free formula works on contact—no biting required—ensuring your dog stays comfortable and disease-free year-round with easy monthly applications.

## 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 🐾🛡️
Review: Quickly Quashed Flea Problems On Pet

## Features

- TWO MONTH PROTECTION: 2 monthly applications of K9 Advantix II flea and tick prevention for medium dogs weighing 11 to 20 pounds
- FLEA, TICK AND MOSQUITO PROTECTION: 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
- EASY TO APPLY: K9 Advantix II flea and tick control for dogs is an easy to apply topical formula
- STARTS WORKING WITHIN 12 HOURS: Starts working to kill fleas within 12 hours and keeps working for 30 days
- EFFECTIVE YEAR-ROUND: Suitable for effective year-round flea and tick treatment for medium dogs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00I2266Y2 |
| Active Ingredients | Imidacloprid, Permethrin, Pyriproxyfen |
| Age Range Description | Puppy |
| Allergen Information | Abalone Free |
| Best Sellers Rank | #52,910 in Pet Supplies ( See Top 100 in Pet Supplies ) #61 in Dog Flea Drops |
| Brand | K9 Advantix |
| Brand Name | K9 Advantix |
| Customer Reviews | 4.3 out of 5 stars 11,458 Reviews |
| Dog Breed Size | Medium |
| Global Trade Identification Number | 00724089060631 |
| Included Components | 2 monthly applications |
| Item Form | Drops |
| Item Type Name | Flea and tick prevention |
| Item Weight | 0.32 Ounces |
| Item form | Drops |
| Item volume | 2 Milliliters |
| Item weight | 0.32 Ounces |
| Manufacturer | K9 Advantix |
| Scent | Topical |
| Scent Name | Topical |
| Target Species | Dog |
| UPC | 724089060631 |
| Unit Count | 2 Count |
| Volume | 2 Milliliters |

## Product Details

- **Brand:** K9 Advantix
- **Item form:** Drops
- **Scent:** Topical
- **Item weight:** 0.32 Ounces
- **Active Ingredients:** Imidacloprid, Permethrin, Pyriproxyfen

## Images

![Bayer K9 Advantix II Flea, Tick & Mosquito Prevention for Medium Dogs, 11-20 lbs - Image 1](https://m.media-amazon.com/images/I/71VIzeRO-YL.jpg)

## 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 24 December 2025*



### ⭐⭐⭐⭐ Quickly Quashed Flea Problems On Pet
*by T***E on 24 January 2026*



### ⭐⭐⭐ Works so, so. Not very well.
*by M***V on 16 January 2026*



## 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)

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**Shop now:** [https://www.desertcart.vu/products/254644755-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-medium](https://www.desertcart.vu/products/254644755-bayer-k9-advantix-ii-flea-tick-and-mosquito-prevention-medium)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-24*