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Can I safely give my 4kg cat a kids' antihistamine for allergies?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 2 years old

Hello sir/mam, Is there anyway that I can give my pet an otc antihistaminic as I am sure he has allergies even when I took him to the vet a week ago he said his chest is clean and it is allergy but he just asked me to change the litter, I did but he's still allergic so can I use kids antihistaminic dose for him if he's 4kg?? I really want him to feel comfortable cause he's been in the streets for too long and I feel so sad about that.. thank you so much..

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 2nd, 2017

Unfortunately, by law it is illegal for the experts at Petco Pet Education Center, formerly Petcoach to give the dose information for any drug, including OTC drugs, without seeing the animal in person first. That's because doing so requires a veterinary client patient relationship which cannot be achieved via an internet forum. In addition, the experts cannot say for certain if a specific drug is safe for your cat. I would give your vet a call to see if you can safely give Kitty an antihistamine, or take him into an ER vet.

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