Vetoquinol Viralys L-Lysine Powder Cat Supplement

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Viralys is an oral supplement that contains the amino acid L-Lysine. Highly palatable powder may be sprinkled over dry food or mixed with a small amount of canned food. For use in cats and kittens as a nutritional supplement for conditions responsive to Lysine.

Key Benefits
  • A highly palatable L-Lysine HCI Nutritional oral powder for cats that may be sprinkled over dry food or mixed with a small amount of canned food
  • For cats and kittens as a nutritional supplement for conditions responsive to Lysine such as upper respiratory problems or feline herpes.
  • This powder will also help reduce inflammation of the eyes, conjunctivitis (eye discharge), squinting sneezing, sinus congestion, and so much more.
  • This L-Lysine supplement is specifically developed for cats and kittens and contains naturally occurring amino acids
  • Made in the USA and manufactured according to rigorous pharmaceutical standards, L-Lysine powder can be safely administered with no known side effects for as long as required

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  • Item Number
  • Weight
    3.52 ounces
  • Brand
    Vet Solutions
  • Food Form
  • Lifestage
  • Product Form
Nutritional Info

Active Ingredients per 1 scoop (0.52 grams): L-Lysine Hydrochloride ..... 500 mg Inactive Ingredients: Brewer's Dried Yeast, Hydrolyzed Fish (enzymatic), Hydrolyzed Poultry Liver (enzymatic), Mixed Tocopherols (a preservative), Sodium Acid Pyrophosphate, Sodium Sulfate.

Feeding Instructions

One rounded scoop contains approximately 500 mg of L - Lysine in a palatable base. The suggested amount for cats over 6 months of age is 1 rounded scoop given orally twice daily. The suggested amount for kittens under 6 months of age is 1/2 scoop given orally twice daily. Adjust amount based on veterinary recommendations.

Trusted Immune System Support

Adding L-lysine as a supplement to your cat's diet is an easy way to help support her long-term health. As a market leader with a wide range of L-lysine products, Vetoquinol puts this active ingredient in tasty chews and bite-size morsels, plus paste, gel and powder form so you can find the best way to offer it to your kitty. These supplements are specifically designed for felines to support the immune system, and maintain respiratory and eye health.

Trusted Immune System Support


Specially formulated Enisyl-F was the first lysine-based nutritional supplement developed for veterinary use for kitties. It helps support normal respiratory health, helps maintain normal eye function and health, and is recommended for immune system support and conditions responsive to L-lysine. Choose from three formulas, including chewy treats, bites and an oral paste.



Veterinarian formulated to deliver just the right dose in a treat with cheese, chicken, liver and hickory smoke flavors.



Tiny mouthfuls of L-lysine disguised as a delicious snack with savory chicken fat and chicken liver.

oral paste

oral paste

Highly palatable paste that can be given by mouth, mixed with food, or even applied to paws for your cat to lick off.


Supplementing with L-lysine is helpful for managing the symptoms of upper respiratory infections in kittens and cats that were strays, and those in shelters. For a highly palatable source of L-lysine HCl, try one of the Viralys formulations, made to support a healthy immune system and conditions that are responsive to L-lysine.

oral powder

oral powder

Delivers L-lysine HCl in a powder with fish and poultry liver flavors that cats crave—just sprinkle it on top of food.

oral gel

oral gel

Cats only need a small amount of this extremely palatable gel to get the benefits of L-lysine HCl.

Seal of Quality

Out of thousands of animal supplement companies, only a hundred are audited NASC members, including Vetoquinol. That means they've undergone a comprehensive quality audit to earn the NASC Quality Seal. Displaying this seal on their products means that you can rest assured that they are committed to following the highest current standards of quality in the industry.

Seal of Quality
About Vetoquinol

About Vetoquinol

Vetoquinol is a family-owned company devoted exclusively to finding innovative solutions for animal health issues. They've shown more than 80 years of dedication, researching everything from oral hygiene to urinary and kidney health to create products that are effective and safe for the pets you love and care about. Founded in 1933 with an expertise in pet pain management and veterinary resources, Vetoquinol has gained the continued trust of pet parents and vets worldwide.

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