---
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: "€ 92.65"
currency: EUR
in_stock: true
reviews_count: 5
category: "Vetoquinol"
url: https://www.desertcart.hr/products/721793768-viralys-l-lysine-supplement-for-cats-cats-and-kittens-all
store_origin: HR
region: Croatia
---

# Supports cats & kittens all ages 500mg lysine per dose Targets eye & respiratory health 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:** € 92.65
**Availability:** ✅ In Stock

## Summary

> 🐾 Keep your cat thriving with Viralys — the daily defense they deserve!

## 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?** € 92.65 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/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:** Perfectly formulated for cats and kittens at every life stage.
- • **Precision Dosage Power:** Delivers 500mg lysine twice daily to reduce viral flare-ups.
- • **Respiratory & Eye Defense:** Helps ease sneezing, watery eyes, and runny noses caused by FHV-1.
- • **Vet-Approved Immune Boost:** Trusted by veterinarians for safe, effective immune support.
- • **Stress-Activated Viral Control:** L-Lysine interferes with herpesvirus replication to reduce viral shedding.

## Overview

Vetoquinol Viralys L-Lysine Powder is a veterinarian-recommended supplement designed to support immune, eye, and respiratory health in cats and kittens. With a precise 500mg lysine dose twice daily, it helps reduce clinical signs and viral shedding of feline herpesvirus type-1 (FHV-1), a common cause of respiratory and ocular issues. Safe, palatable, and effective for all ages, Viralys empowers cat owners to proactively manage their pets’ health and wellbeing.

## 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.

Review: Excellent produit.
Review: This is very good tonic for cats

## 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 |
| Batteries Included | No |
| Best Sellers Rank | #9,211 in Pet Supplies ( See Top 100 in Pet Supplies ) #241 in Cat Health Supplies |
| Breed Recommendation | All Breed Sizes |
| Color | Premium pack |
| Customer Reviews | 4.6 4.6 out of 5 stars (8,490) |
| Date First Available | 26 February 2019 |
| Flavor | Fish & Poultry |
| Item Form | Powder |
| Item Weight | 0.28 g |
| Item model number | 410633 |
| Number of Items | 1 |
| Pet Life Stage | all ages |
| Pet Type | Cat, Kitten |
| Product Dimensions | 10.16 x 12.7 x 12.7 cm; 0.28 g |
| Quantity | 1 |
| Size | 100 Grams |
| Specific Uses | Eyes, Sneezing |
| Storage Information | Store at a controlled room temperature. |
| Volume | 3.5 Fluid Ounces |
| batteries required | No |

## 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)

## Available Options

This product comes in different **Size** options.

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***E on 23 October 2025*

Excellent produit.

### ⭐⭐⭐⭐⭐ Review
*by J***A on 14 November 2025*

This is very good tonic for cats

### ⭐⭐⭐⭐⭐ Review
*by K***Y on 21 February 2025*

Have used product before in jel form and now am trying powder for convenience to add to can food. I think this is a very effective product/supplement. Highly recommend 👌🏻

## 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 Croatia*
*Store origin: HR*
*Last updated: 2026-02-24*