---
product_id: 721793768
title: "Viralys L-Lysine Supplement for Cats - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Flavored Lysine Powder"
brand: "vetoquinol"
price: "2893160₫"
currency: VND
in_stock: true
category: "Vetoquinol"
url: https://www.desertcart.vn/products/721793768-viralys-l-lysine-supplement-for-cats-cats-and-kittens-all
store_origin: VN
region: Vietnam
---

# Supports cats & kittens all ages 500mg L-Lysine per dose Vet-recommended immune defense Viralys L-Lysine Supplement for Cats - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Flavored Lysine Powder

**Brand:** vetoquinol
**Price:** 2893160₫
**Availability:** ✅ In Stock

## Summary

> 🛡️ Keep your cat’s immune game strong — because they deserve the best defense!

## Quick Answers

- **What is this?** Viralys L-Lysine Supplement for Cats - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Flavored Lysine Powder by vetoquinol
- **How much does it cost?** 2893160₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/721793768-viralys-l-lysine-supplement-for-cats-cats-and-kittens-all)

## Best For

- vetoquinol enthusiasts

## Why This Product

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

## Key Features

- • **All-Age Feline Formula:** Safe and effective for kittens through senior cats, ensuring lifelong immune support.
- • **Stress-Activated Defense:** Helps reduce flare-ups triggered by stress, keeping your cat vibrant and active.
- • **Vet-Trusted & Recommended:** Backed by veterinarians for reliable respiratory and ocular health benefits.
- • **Clinically Proven Immune Boost:** L-Lysine powder reduces herpesvirus symptoms and viral shedding for healthier cats.
- • **Palatable Fish & Poultry Flavor:** Easy-to-administer powder your cat will actually enjoy, making daily care hassle-free.

## Overview

Vetoquinol Viralys L-Lysine Powder delivers a veterinarian-recommended 500mg dose of L-Lysine to cats and kittens, supporting immune, respiratory, and eye health by reducing clinical signs and viral shedding of feline herpesvirus type-1. This palatable, fish and poultry-flavored supplement is safe for daily use across all ages, trusted by vets, and designed to help manage common feline health challenges with no known side effects.

## Description

Viralys Powder is a powerful L-Lysine supplement that has been proven to decrease the clinical signs of infection and reduce viral shedding of herpesvirus type-1 (FHV-1), a common cause of respiratory and eye problems in cats. This palatable powder is easy to administer.Viralys Powder supplement is specifically developed for cats and kittens to reduce clinical signs and viral shedding. Viralys Powder contains a naturally occurring form of L-Lysine specifically developed for cats and kittens. L-Lysine competes with arginine, an amino acid essential to the development of the herpesvirus, interfering with the virus's ability to replicate and consequently reducing the viral load.Viralys Powder Features:Excellent safety profile with no known side effects Compatible with other therapies L-lysine supplements lessen the clinical signs of infection and reduce viral shedding. L-Lysine has been shown to:Lessen the clinical signs of FHV-1 Reduce viral shedding in the face of stressors known to induce viral reactivation Reduce the frequency of flare up Feline herpesvirus type-1 (FHV-1) is one of the most common causes of respiratory infections and eye problems in cats. In fact, up to 97% of cats have serological evidence of exposure to FHV-1. Following recovery from primary infection, up to 80% of cats become carriers. Even though carriers can remain asymptomatic for long periods of time, they continue to harbor the virus in nerve cells and can pass it on to uninfected cats, especially during times of stress.

## Features

- Daily L-Lysine Supplement - Viralys Lysine for cats helps support a strong immune system and can help support eye and respiratory health in cats and kittens of all ages
- Supports Feline Health Issues - Vetoquinol Lysine for Cats can help manage common feline health issues and provides support to help a cat's immune system, ocular health, and respiratory health
- L-Lysine for Cats - Viralys L-Lysine for cats and kittens provides specially formulated immune support for as long as needed to help manage conditions responsive to lysine
- Vet Recommended - Trusted by veterinarians, Viralys L-Lysine Powder provides a safe and reliable solution for supporting your cat's immune and respiratory systems.
- 500mg of Lysine - Viralys Powder delivers the veterinarian-recommended amount of lysine for cats at 500mg 2x daily, and kittens at 250mg

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000FULBT4 |
| Active Ingredients | Active ingredients: L-Lysine hydrochloride, 500mg. Inactive ingredients: Brewer’s Dried Yeast, Hydrolyzed Fish (enzymatic), Hydrolyzed Poultry Liver (enzymatic), Mixed Tocopherols (a preservative), Sodium Acid Pyrophosphate, Sodium Sulfate. |
| Best Sellers Rank | #7,745 in Pet Supplies ( See Top 100 in Pet Supplies ) #205 in Cat Health Supplies |
| Brand Name | Vetoquinol |
| Customer Reviews | 4.6 4.6 out of 5 stars (8,625) |
| Flavor | Fish & Poultry |
| Global Trade Identification Number | 00030521041480 |
| Included Components | Vetoquinol Viralys Powder, 100gm |
| Item Form | Powder |
| Item Weight | 0.01 Ounces |
| Manufacturer | Vetoquinol |
| Manufacturer Part Number | 410633 |
| Model Number | 410633 |
| Number of Items | 1 |
| Product Benefits | Immune Support |
| Specific Uses For Product | Eyes, Sneezing |
| Target Species | Cat |
| UPC | 030521041480 884291149927 |
| Unit Count | 2.5 Grams |
| Volume | 3.5 Fluid Ounces |

## Product Details

- **Brand:** Vetoquinol
- **Flavour:** Fish & Poultry
- **Item form:** Powder
- **Item weight:** 0.01 Ounces

## Images

![Viralys L-Lysine Supplement for Cats - Cats & Kittens of All Ages - Immune Health - Sneezing, Runny Nose, Squinting, Watery Eyes - Flavored Lysine Powder - Image 1](https://m.media-amazon.com/images/I/71IiAj4UUCL.jpg)

## Questions & Answers

**Q: How much lysine in a "scoop" dose? How many doses in a 100 gram jar?**
A: Hi, according to what it says on the jar, "contains approximately 500 mg of L-Lysine Hydrochloride in a palatable base"  I'm not sure about how many doses in a 100 gram jar (it doesn't say on the jar). I only use it occasionally, so it lasts a really long time for me. They suggest one rounded scoop twice daily. I usually just use one scoop at night in their wet food and it seems to work well enough. The scoop is small, I would guess maybe around 1/8 teaspoon? A very good product at any rate and my cats seem to love the taste and will eat it when mixed in with their wet food. Hope this helps.

**Q: What are the ingredients in Vetoquinol Viralys Powder?**
A: I want to let people who are giving this product to their cats, what hydrolyzed food ingredients are.  Hydrolysis is basically chemical digestion.  The protein, in this case fish & liver, is boiled in sulfuric aced for anywhere from several hours to more than a day to break down the proteins.  Then lye is added to raise the ph back to neutral.  Just what I want to give my cats.  Or not!!!  This is the trouble with buying from the internet.  The full label is usually not available & even when it is, the print is usually so tiny, not to mention blurred,  as to be impossible to read.

**Q: What is the shelf life?**
A: If you buy it from us. To_Your_Health, you will be guaranteed to get the freshest products available.  As of today, December 28, 2015, the expiration date on the containers in stock should be December 2017 or better.  Thanks.

**Q: My cat won't eat wet food & only treats that R crunchy on outside & soft inside. Which might be best chance I have ?**
A: The same maker of the this powdered form of L-lysine also makes this supplement is the form of a crunchy treat and a flavored paste (no affiliation). I recommend (as a vet) 500 mg twice daily to begin with, you can titrate up or down to the most effective dose, but always follow the recommendation of your veterinarian. Also note that l-lysine is most effective against the respiratory/ocular symptoms caused by feline herpes virus, a viral (but not venereal) disease most cats have been exposed to and, just like love, herpes virus lasts forever. The amino acid L-lysine is believed to inhibit the recrudescence of the virus during periods of physiologic stress.

## Frequently Bought Together

- Vetoquinol Viralys Daily L-Lysine Powder for Cats and Kittens, Fish Flavored Lysine Supplement for Cats and Kittens to Support Immune Health, Normal Eye Function and Respiratory Health, 100gm
- Purina Pro Plan Veterinary Supplements FortiFlora Cat Probiotic Supplement for Cats with Diarrhea - 30 ct. Box
- Vetoquinol Viralys Daily L-Lysine Gel for Cats and Kittens, Maple Flavored Lysine Supplement for Cats and Kittens to Support Immune Health, Normal Eye Function and Respiratory Health, 5oz

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-22*