---
product_id: 254644750
title: "II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 2-Mo Supply (Packaging may vary)"
brand: "k9 advantix"
price: "€ 76.53"
currency: EUR
in_stock: true
reviews_count: 5
category: "K9 Advantix"
url: https://www.desertcart.hr/products/254644750-ii-large-dog-vet-recommended-flea-tick-and-mosquito-treatment
store_origin: HR
region: Croatia
---

# For dogs 21-55 lbs Waterproof after 24 hours Kills fleas in 12 hours II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 2-Mo Supply (Packaging may vary)

**Brand:** k9 advantix
**Price:** € 76.53
**Availability:** ✅ In Stock

## Summary

> 🐾 Protect your pup like a pro—fast, fuss-free, and foolproof!

## Quick Answers

- **What is this?** II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 2-Mo Supply (Packaging may vary) by k9 advantix
- **How much does it cost?** € 76.53 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/254644750-ii-large-dog-vet-recommended-flea-tick-and-mosquito-treatment)

## 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 Protection:** Keeps working even after your dog’s swim or bath, waterproof after 24 hours
- • **Effortless Application:** Fragrance-free, topical spot-on 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

## Overview

K9 Advantix II Large Dog is a vet-recommended, topical flea, tick, mosquito, biting fly, and lice treatment for dogs 21-55 lbs. It kills fleas within 12 hours and repels pests on contact, preventing bites and infestations. The fragrance-free formula is waterproof after 24 hours and easy to apply without a prescription, offering convenient monthly protection to keep your dog comfortable and healthy.

## Description

K9 Advantix II Large 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 Large 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 21-55 lbs. to use K9 Advantix II Large 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 Large Dog is a trademark of Elanco or its affiliates.

Review: It works
Review: Great flea medicine

## 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 | B00N7DEBN4 |
| Active Ingredients | Imidacloprid, Permethrin, Pyriproxyfen |
| Age Range Description | 7 weeks and older |
| Allergen Information | Allergen-Free |
| Best Sellers Rank | #49,797 in Pet Supplies ( See Top 100 in Pet Supplies ) #58 in Dog Flea Drops |
| Brand | K9 Advantix |
| Brand Name | K9 Advantix |
| Customer Reviews | 4.4 out of 5 stars 16,000 Reviews |
| Item Form | Topical |
| Item Type Name | Topical |
| Item Weight | 41 g |
| Item form | Topical |
| Item volume | 5 Milliliters |
| Item weight | 41 g |
| Manufacturer | K9 Advantix |
| Scent | Unscented |
| Scent Name | Unscented |
| Target Species | Dog |
| UPC | 724089060716 |
| Unit Count | 2 Count |
| Volume | 5 Milliliters |

## Product Details

- **Active Ingredients:** Imidacloprid, Permethrin, Pyriproxyfen
- **Brand:** K9 Advantix
- **Item form:** Topical
- **Item weight:** 41 g
- **Scent:** Unscented

## Images

![II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 2-Mo Supply (Packaging may vary) - Image 1](https://m.media-amazon.com/images/I/71TEm2OCbGL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ It works
*by A***R on 10 June 2025*



### ⭐⭐⭐⭐⭐ Great flea medicine
*by M***D on 10 January 2026*



### ⭐⭐⭐⭐⭐ It's so easy
*by 2***S on 26 January 2026*



## Frequently Bought Together

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

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-01*