---
product_id: 254644752
title: "Bayer II Topical Flea Treatment for Medium Dogs, 11-20 lbs 11-20 lb 5461731"
brand: "advantage"
price: "C$12399"
currency: NIO
in_stock: true
reviews_count: 5
category: "Advantage"
url: https://www.desertcart.ni/products/254644752-bayer-ii-topical-flea-treatment-for-medium-dogs-11-20
store_origin: NI
region: Nicaragua
---

# starts working in 12 hrs kills fleas at all life stages 6 monthly doses Bayer II Topical Flea Treatment for Medium Dogs, 11-20 lbs 11-20 lb 5461731

**Brand:** advantage
**Price:** C$12399
**Availability:** ✅ In Stock

## Summary

> 🐾 Stay ahead of fleas—because your dog’s comfort can’t wait!

## Quick Answers

- **What is this?** Bayer II Topical Flea Treatment for Medium Dogs, 11-20 lbs 11-20 lb 5461731 by advantage
- **How much does it cost?** C$12399 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/254644752-bayer-ii-topical-flea-treatment-for-medium-dogs-11-20)

## Best For

- advantage enthusiasts

## Why This Product

- Trusted advantage brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Action Formula:** Begins killing fleas within 12 hours—because your dog deserves fast relief.
- • **Waterproof Protection:** Keeps working even after your dog’s splashy adventures, ensuring 30 days of continuous defense.
- • **Complete Life Cycle Control:** Eliminates eggs, larvae, and adults to break the flea cycle for good.
- • **Vet-Recommended Flea Defense:** Trusted by professionals to keep your medium dog flea-free and happy.
- • **Effortless Monthly Application:** Spot-on treatment that’s quick, mess-free, and fragrance-free—no pills or collars needed.

## Overview

Advantage Bayer II Topical Flea Treatment delivers six easy monthly applications designed specifically for medium dogs (11-20 lbs). This vet-recommended, fragrance-free formula kills fleas at every life stage through contact—no biting required—and starts working within 12 hours. Waterproof after 24 hours, it provides continuous protection for up to 30 days, breaking the flea life cycle and keeping your dog comfortable and flea-free all month long.

## Description

Advantage II Medium Dog is the vet-recommended prevention and treatment of flea and lice infestations in dogs. Advantage II Medium Dog flea treatment and prevention kills adult fleas, flea larvae and flea eggs to deliver total flea protection to your dog or puppy. In fact, within 12 hours of application, Advantage II Medium Dog topical treatment gets straight to work killing fleas through contact, so they don’t have to bite your dog to die.This 30-day treatment effectively breaks the flea life cycle, controlling existing flea and lice infestations and preventing further infestations all month long. Fleas not only cause discomfort; they can also pose other health risks. Monthly use of Advantage II Medium Dog is important to protect your dog against fleas that may cause transmission of tapeworms in dogs, Flea Allergy Dermatitis and flea bite anemia.That’s why Advantage II 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 Advantage II is fragrance-free and waterproof after 24 hours of application. Check the product label for information on application and potential side effects. Advantage II Medium Dog flea and lice protection is effective on both indoor and outdoor dogs. Your dog should be at least 7 weeks old and weigh 11 to 20 lbs. to use Advantage II Medium Dog.For the ultimate convenience in care, Advantage II Medium Dog is available over the counter – no prescription needed. And, you can stock up with a subscription for regular doorstep deliveries so you never miss a monthly treatment. Once Advantage II Medium Dog is applied, your dog is ready to get right back to exploring his favorite places – from the backyard to the dog park.Advantage II Medium Dog is a trademark of Elanco or its affiliates.

Review: I recently tried the Advantage II Medium Dog Flea Treatment for my furry friend, and while it does offer some level of protection, I can't help but feel it falls short in certain aspects. On the positive side, the convenience of a 6-month supply is appealing, and the application is relatively straightforward. My dog didn't seem bothered by it, and I appreciate the effectiveness in preventing fleas. However, my concerns arise when considering the limited scope of coverage. Advantage II is primarily designed for flea prevention, and while it does that job adequately, it doesn't provide protection against more serious illnesses transmitted by ticks. In my region, where tick-borne diseases are a significant concern, I opted for monthly pills with a prescription from my vet. The decision to switch to a different product was based on the need for comprehensive protection, especially considering the potential health risks associated with tick bites. While Advantage II may be suitable for areas where ticks are less prevalent, it didn't align with my dog's specific health requirements. In conclusion, if you're primarily dealing with flea prevention and live in an area where ticks are not a major concern, Advantage II could be a convenient option. However, for pet owners in regions with a higher risk of tick-borne diseases, it might be worth exploring alternative solutions with broader coverage, potentially involving a discussion with your vet for a prescription-based monthly treatment.
Review: Keeps fleas gone

## Features

- New packaging, same formula: Contains six one-month applications of Bayer Advantage II topical flea prevention and treatment for medium dogs 11-20 lbs
- Advantage II works through contact, so fleas don't have to bite your dog to die
- Effective flea treatment kills fleas in multiple life stages - eggs, larvae and adults - to break the flea life cycle
- Easy-to-apply dog flea treatment starts working within 12 hours and protects for up to 30 days
- Advantage II is vet-recommended, fragrance-free and designed specifically to treat and prevent fleas on dogs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004QREOZA |
| Allergen Information | Abalone Free |
| Batteries Included | No |
| Best Sellers Rank | #82,708 in Pet Supplies ( See Top 100 in Pet Supplies ) #104 in Dog Flea Drops |
| Color | Mix |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,728) |
| Date First Available | 6 August 2012 |
| Flavor | Other |
| Item Form | Topical |
| Item Weight | 68 g |
| Item model number | 86336715 |
| Number of Items | 1 |
| Pet Life Stage | All Life Stages |
| Product Dimensions | 3.49 x 11.11 x 16.83 cm; 68.04 g |
| Quantity | 1 |
| Size | 11-20 lb |
| Volume | 6 Milliliters |
| batteries required | No |

## Product Details

- **Active Ingredients:** Pyriproxyfen
- **Brand:** Advantage
- **Item form:** Topical
- **Item weight:** 0.15 Pounds
- **Scent:** water

## Images

![Bayer II Topical Flea Treatment for Medium Dogs, 11-20 lbs 11-20 lb 5461731 - Image 1](https://m.media-amazon.com/images/I/71dsfndyWQL.jpg)

## Questions & Answers

**Q: My dog only goes out to get groomed every 3 months or to vet. Do I need to use this all the time or can I apply it 1 week before groom/vet day?**
A: This is a once a month topical treatment. You can apply prior to the appt. however it doesn't start to work until after the 1st 12 hours of being applied. 
Thank you. 
Heartland Vet Supply Customer Service

**Q: is this 4 mn or 6 mn / discrepancy in description**
A: There is an option for both 4 month and 6 month packages

**Q: Can I return this product?**
A: Hi. We recommend you contact the seller for a replacement or refund.

**Q: El producto es de bayer ? o es de elanco ?? porque el enunciado dice una cosa y la caja dice otra. esto es confuso !**
A: Hi. Elanco acquired Bayer Animal Health in 2020, including the Advantage II brand. 

To learn more about Advantage II and other Elanco products, visit PetBasics.Elanco.com.

## Customer Reviews

### ⭐⭐⭐ Review
*by D***. on 29 December 2023*

I recently tried the Advantage II Medium Dog Flea Treatment for my furry friend, and while it does offer some level of protection, I can't help but feel it falls short in certain aspects. On the positive side, the convenience of a 6-month supply is appealing, and the application is relatively straightforward. My dog didn't seem bothered by it, and I appreciate the effectiveness in preventing fleas. However, my concerns arise when considering the limited scope of coverage. Advantage II is primarily designed for flea prevention, and while it does that job adequately, it doesn't provide protection against more serious illnesses transmitted by ticks. In my region, where tick-borne diseases are a significant concern, I opted for monthly pills with a prescription from my vet. The decision to switch to a different product was based on the need for comprehensive protection, especially considering the potential health risks associated with tick bites. While Advantage II may be suitable for areas where ticks are less prevalent, it didn't align with my dog's specific health requirements. In conclusion, if you're primarily dealing with flea prevention and live in an area where ticks are not a major concern, Advantage II could be a convenient option. However, for pet owners in regions with a higher risk of tick-borne diseases, it might be worth exploring alternative solutions with broader coverage, potentially involving a discussion with your vet for a prescription-based monthly treatment.

### ⭐⭐⭐⭐⭐ Review
*by J***H on 21 February 2026*

Keeps fleas gone

### ⭐⭐⭐⭐⭐ Review
*by D***2 on 7 November 2025*

Keeps the fleas, ticks etc. away. Great alternative to revolution.

## Frequently Bought Together

- Advantage II Medium Dog Vet-Recommended Flea Treatment & Prevention | Dogs 11-20 lbs. | 6-Month Supply
- Advantage II Large Cat Vet-Recommended Flea Treatment & Prevention | Cats Over 9 lbs. | 6-Month Supply
- Advantage II Small Cat Vet-Recommended Flea Treatment & Prevention | Cats 5-9 lbs. | 6-Month Supply

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-03-14*