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Is human lysine safe for cats? My vet prescribed it, but it's costly.

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 2 years and 8 months old | 10 lbs

my vet prescribed lysine powder for my adult male cat. can i use nature made supplements for humans ? Its the same amino acid and its much cheaper

2 Answers

Most Helpful Answer

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Answered By Jennifer Ladd, DVM

Veterinarian

Published on April 9th, 2017

I would also like to add that sourcing is a big issue for supplements. Apart from the palatabity, some companies are better than others. If you choose this route, make sure you speak with someone in a supplement specialty store about reputation. Since there is no governing body for supplements, contaminants are possible.

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    Answered By Karly Macon, DVM, MS, CVA Certified Veterinary Acupuncturist

    Veterinarian

    Published on

    Yes, you can. However, this is a giant, unflavored tablet and good luck getting this into your cat! The veterinary formulation that I use comes in flavored cat treats or flavored paste, and is therefore much easier and palatable to your cat :).

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