---
product_id: 255854838
title: "K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply"
brand: "k9 advantix"
price: "$85.87"
currency: USD
in_stock: true
reviews_count: 6
category: "K9 Advantix"
url: https://www.desertcart.us/products/255854838-k9-advantix-ii-large-dog-vet-recommended-flea-tick-mosquito
store_origin: US
region: United States of America
---

# Waterproof after 24 hours Kills fleas in 12 hours Vet-recommended, multi-pest protection K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply

**Brand:** k9 advantix
**Price:** $85.87
**Availability:** ✅ In Stock

## Summary

> 🐾 Protect your best friend like a pro—because they deserve the best defense!

## Quick Answers

- **What is this?** K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply by k9 advantix
- **How much does it cost?** $85.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/255854838-k9-advantix-ii-large-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

- • **Multi-Pest Shield:** Protects against fleas, ticks, mosquitoes, biting flies, and lice in one easy step.
- • **All-Weather Defense:** Waterproof formula keeps working even after a swim or bath.
- • **Vet-Trusted Formula:** Recommended by professionals for safe, effective pest control on large dogs (21-55 lbs).
- • **Effortless Application:** Fragrance-free, topical treatment that’s simple to apply—no prescription needed.
- • **Rapid Flea Elimination:** Fleas are dead within 12 hours—no more itching or scratching.

## Overview

K9 Advantix II Large Dog is a vet-recommended, topical flea, tick, and mosquito treatment designed for dogs weighing 21-55 lbs. It kills fleas within 12 hours and provides waterproof protection after 24 hours. This 4-month supply formula repels multiple pests including biting flies and lice, is fragrance-free, and requires no prescription, making it a convenient and trusted choice for proactive pet care.

## Description

K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply : desertcart.ae: Pet Supplies

Review: السعر مرتفع مقارنة في جودة المنتج
Review: Buen producto pero las cajas han venido un poco golpeadas. Esto no afecta al producto, pero estéticamente no está bien.

## 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 | B004QMX4YW |
| Active Ingredients | Imidacloprid, Permethrin, Pyriproxyfen |
| Age Range Description | 7 weeks and older |
| Allergen Information | Allergen-Free |
| Best Sellers Rank | #11,563 in Pet Supplies ( See Top 100 in Pet Supplies ) #16 in Dog Flea Drops |
| Brand Name | K9 Advantix |
| Customer Reviews | 4.5 4.5 out of 5 stars (9,227) |
| Dog Breed Size | Large |
| Global Trade Identification Number | 00724089203991 |
| Included Components | 4 |
| Item Form | Topical |
| Item Type Name | Topical |
| Item Weight | 0.02 Pounds |
| Manufacturer | K9 Advantix |
| Manufacturer Part Number | 710546030004 |
| Model Number | 86315041 |
| Scent Name | Unscented |
| Target Species | Dog |
| UPC | 724089203991 |
| Unit Count | 1 Count |
| Volume | 10 Milliliters |

## Product Details

- **Active Ingredients:** Imidacloprid, Permethrin, Pyriproxyfen
- **Brand:** K9 Advantix
- **Item form:** Topical
- **Item weight:** 0.02 Pounds
- **Scent:** Unscented

## Images

![K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21-55 lbs. | 4-Mo Supply - Image 1](https://m.media-amazon.com/images/I/71U+2ITgYeL.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.

## Customer Reviews

### ⭐⭐⭐ Review
*by A***R on 31 January 2024*

السعر مرتفع مقارنة في جودة المنتج

### ⭐⭐⭐⭐ Review
*by S***S on 10 February 2021*

Buen producto pero las cajas han venido un poco golpeadas. Esto no afecta al producto, pero estéticamente no está bien.

### ⭐⭐⭐⭐ Review
*by L***A on 6 June 2020*

El pedido llego varios dias antes de lo previsto, estas pipetas las llevo utilizando desde hace varios años con mi perro y siempre me han salido bien, creo k son de las mejores marcas k hay actualmente.

## Frequently Bought Together

- K9 Advantix II Large Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 21 - 55 lbs. | 4-Mo Supply
- K9 Advantix II XL Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs Over 55 lbs. | 4-Mo Supply
- K9 Advantix II Medium Dog Vet-Recommended Flea, Tick & Mosquito Treatment & Prevention | Dogs 11-20 lbs. | 4-Mo Supply

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-18*