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Does lysine supplement really work for cats with herpes virus?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed

the pet md said that lysine supplement dosnt really work that good for cats with herpes virus is that true

1 Answer

Most Helpful Answer

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Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH

Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner

Published on November 29th, 2017

I would have to respectfully disagree with that statement. I have used Lysine for years and many cats have improved with it. The limitations are that it probably only works for Herpes infection (not other upper respiratory viruses in cats, and we don't often do testing to know for sure that it is Herpes virus causing the clinical signs), and it only works to slow down the replication of the virus (not eliminate the infection). I have attached 2 handouts below which discuss using Lysine in feline Herpes virus. (The first one discusses how Lysine works.) https://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=1327 https://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=613 I hope that answers your question and was helpful. Thanks for using PetCoach.

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