Can I give my cat human L-lysine pills? What's the right dosage?
Updated On September 23rd, 2025
Pet's info: Cat | Persian | Female | unspayed | 3 years and 10 months old | 8 lbs
Can I use human l-lysine pills for cats? How much is the dosage for every kg? Thanks
3 Answers
Most Helpful Answer
Published on March 1st, 2017
Yes you can use human grade lysine for cats, but getting a cat specific one is easier in terms of getting Nabat to take them because they are flavored. If you use a human grade one, you can cut a 500mg pill in half and mix it in with her food twice a day. For the cat ones, Enisyl and Viralys are both good brands, and can be purchased over the counter without a prescription - just follow the dosing instructions on the label based on your cat's weight.
16Pet Parents found this answer helpful
Related Answers from Veterinarians
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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.
1Pet Parents found this answer helpful
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Published on December 9th, 2017
No, use only lysine that is made for cats. It is specially formulated so that cats can absorb it and it is in the correct dosage so there is no possibility for overdosing. It comes in many forms: gel, treats/chews, powder, etc. So just use whichever one you think Muffin will eat. https://www.google.com/search?q=lysine+for+cats&source=lnms&tbm=shop&sa=X&ved=0ahUKEwjcye3Gov7XAhXp6IMKHRLXCnUQ_AUICigB&biw=1301&bih=619 As for dosing, just follow the dosing on the product that you purchase. The dosing varies depending on what you are using it for. If you are using it as an immune booster/preventive then the dose will be lower than if you are using it to treat an outbreak of herpes virus (for example). Hope this helps. Best wishes.
1Pet Parents found this answer helpful
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