---
product_id: 615846162
title: "Flea, Tick & Mosquito Prevention for Dogs 21-55 lbs. | Flea Drops for Large Dogs | Apply Monthly | 2 Treatments"
brand: "k9 advantix"
price: "€ 20.78"
currency: EUR
in_stock: true
reviews_count: 8
category: "K9 Advantix"
url: https://www.desertcart.ie/products/615846162-flea-tick-and-mosquito-prevention-for-dogs-21-55-lbs
store_origin: IE
region: Ireland
---

# Kills fleas within 12 hours For dogs 21-55 lbs Waterproof after 24 hours Flea, Tick & Mosquito Prevention for Dogs 21-55 lbs. | Flea Drops for Large Dogs | Apply Monthly | 2 Treatments

**Brand:** k9 advantix
**Price:** € 20.78
**Availability:** ✅ In Stock

## Summary

> 🐾 Stay ahead of pests, keep your best friend itch-free and unstoppable!

## Quick Answers

- **What is this?** Flea, Tick & Mosquito Prevention for Dogs 21-55 lbs. | Flea Drops for Large Dogs | Apply Monthly | 2 Treatments by k9 advantix
- **How much does it cost?** € 20.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/615846162-flea-tick-and-mosquito-prevention-for-dogs-21-55-lbs)

## 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

- • **Waterproof Formula:** Rain or swim, protection stays effective after just 24 hours—no need to worry about losing coverage.
- • **Rapid Action Defense:** Starts killing and repelling fleas, ticks, and mosquitoes within 12 hours—fast relief for your active dog.
- • **Easy & Fragrance-Free:** Simple, mess-free application with no overpowering scent—perfect for sensitive pups and busy owners.
- • **Vet-Recommended Value:** Prescription-free, affordable, and trusted by thousands of dog parents to keep their pets itch-free and happy.
- • **Long-Lasting Protection:** One monthly topical application keeps pests at bay for a full 30 days, so you can focus on adventures, not treatments.

## Overview

K9 Advantix Flea, Tick & Mosquito Prevention is a monthly topical treatment designed for dogs weighing 21-55 lbs. It kills and repels fleas, ticks, mosquitoes, biting flies, and lice within 12 hours of application. Waterproof after 24 hours and fragrance-free, it offers fast, effective, and affordable protection without the need for a prescription.

## Description

K9 Advantix kills and repels fleas, ticks, mosquitoes, biting flies, and lice. Simpler than a flea collar and hard-to-swallow pills, this topical formula works within 12 hours of initial application to stop existing flea infestations on dogs and prevent new ones by killing adult fleas on contact before they lay new eggs or bite your dog. K9 Advantix offers fast relief at an excellent value, so you and your dog can get back to the things you love most. Your dog should be at least 7 weeks old and weigh 21-55 lbs. to use K9 Advantix Large Dog. Use as directed by label. Do not use on cats.

Review: Great coverage from pests for my Bella - Been using on my French Buil dog for 4 months. Works great, no skin or adverse reactions and MUCH easier on my budget than RX I used previously.
Review: Keeps my dog and family happy. - For less than $8/mo, this keeps my German Shepard happy and itch free. He know it helps him, as well, and will sit still for me as I apply it to his back. It works fast, is plenty effective for a dog his size, and lasts the advertized 30 days. I can usually tell when it starts wearing off if I'm not keeping track because my dog starts scratching again. This also keeps fleas out of my house, as well. We only own a single dog, but as long as he's treated, there's no issues. I feel this is a safe option too when considered around small children. We just don't allow any petting for the first day after treatment. Overall, this is an excellent product at an affordable price.

## Features

- An excellent value from the K9 Advantix brand
- K9 Advantix Large Dog 30-day treatment & prevention protects dogs 21-55 lbs. from fleas, ticks, mosquitoes, biting flies and lice
- Affordable formula works on contact to kill and repel fleas on dogs within 12 hours of application even without a bite
- Easy-to-apply topical treatment is fragrance-free and waterproof after 24 hours
- No prescription needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Active Ingredients | Imidacloprid Permethrin |
| Brand | K9 Advantix |
| Customer Reviews | 4.4 out of 5 stars 866 Reviews |
| Item Form | Topical |
| Item Volume | 0.8 Milliliters |
| Item Weight | 0.05 Pounds |
| Scent | Unscented |

## Product Details

- **Active Ingredients:** Imidacloprid Permethrin
- **Age Range (Description):** 7 weeks and older
- **Allergen Information:** Allergen-Free
- **Brand:** K9 Advantix
- **Global Trade Identification Number:** 00727804566555
- **Item Form:** Topical
- **Item Volume:** 0.8 Milliliters
- **Item Weight:** 0.05 Pounds
- **Scent:** Unscented
- **UPC:** 727804566555

## Images

![Flea, Tick & Mosquito Prevention for Dogs 21-55 lbs. | Flea Drops for Large Dogs | Apply Monthly | 2 Treatments - Image 1](https://m.media-amazon.com/images/I/71KRg5hdNJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great coverage from pests for my Bella
*by S***M on January 23, 2026*

Been using on my French Buil dog for 4 months. Works great, no skin or adverse reactions and MUCH easier on my budget than RX I used previously.

### ⭐⭐⭐⭐⭐ Keeps my dog and family happy.
*by T***E on November 22, 2025*

For less than $8/mo, this keeps my German Shepard happy and itch free. He know it helps him, as well, and will sit still for me as I apply it to his back. It works fast, is plenty effective for a dog his size, and lasts the advertized 30 days. I can usually tell when it starts wearing off if I'm not keeping track because my dog starts scratching again. This also keeps fleas out of my house, as well. We only own a single dog, but as long as he's treated, there's no issues. I feel this is a safe option too when considered around small children. We just don't allow any petting for the first day after treatment. Overall, this is an excellent product at an affordable price.

### ⭐⭐⭐⭐⭐ Flea and tick drops
*by D***D on January 25, 2026*

Good price and good quality

## Frequently Bought Together

- K9 Advantix Flea, Tick & Mosquito Prevention for Dogs 21-55 lbs. | Flea Drops for Large Dogs | Apply Monthly | 2 Treatments
- K9 Advantix Flea, Tick & Mosquito Prevention for Dogs Over 55 lbs. | Flea Drops for Extra Large Dogs | Apply Monthly | 2 Treatments
- K9 Advantix Flea, Tick & Mosquito Prevention for Dogs 11-20 lbs. | Flea Drops for Medium Dogs | Apply Monthly | 2 Treatments

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-02*