fbpx Viralys | My Happy Pets

Viralys is an L-Lysine supplement specially developed for cats and kittens. It is an easy and great-tasting way to support a healthy immune system and maintain normal eye health. Viralys is a pioneer of veterinary L-Lysine therapy and has been the trusted brand for over 12 years.

Viralys highlights

  • Can be safely administered with no known side effects for as long as needed
  • Available in a palatable maple flavored gel and a fish-flavored powder. Cats love the taste!
  • All of our L-Lysine products proudly display the National Animal Supplement Council (NASC) Seal


Gel: Place a small amount on cat's nose to stimulate taste interest. Once initial interest has been established, a syringe or teaspoon may be used. Delivers 500 mg of L-lysine per 1/2 tsp. For routine use, administer 1/2 tsp. twice daily.

Powder: For routine use, administer 1 scoop twice daily. Delivers 500 mg of L-lysine per scoop. 


L-lysine hydrochloride, 500 mg


  • Gel: 5 oz.
  • Powder: 3.5 oz. and 21 oz.

Consult your veterinarian before giving your pet Viralys. Follow the recommended administration on the package, unless otherwise instructed by your veterinarian.

Viralys Lysine Supplements for Cats