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My cat has a URI. Is lysine safe and effective for their treatment?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 4 months and 23 days old | 5 lbs

Is lysine good for a cat that may have a mild URI?

1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on October 24th, 2017

It is if there is a potential for viral involvement! It certainly won’t hurt at least. Most upper respiratory infections may need an oral antibiotics as well. You can try a 1/2 teaspoon of children’s Benadryl as well twice a day which may help. If he isn’t improving, lethargic, or loses his appetite, I would have your vet take a look at him. I hope this helps!

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