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My dog has allergies. Can I give them human allergy medicine?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 9 years and 10 months old

Can I give my dog allergy medicine?

3 Answers

Most Helpful Answer

Daniel Fonza, DVM

Answered By Daniel Fonza, DVM

Veterinarian

Published on November 15th, 2017

Many allergy medications are safe to give to dogs over the counter. It is always best to double check with your veterinarian regarding the dose and the drug you are about to give. What you have in the picture is generic system and is quite safe for dogs. The dose that I typically use is 0.5mg/kg of body weight every 24 hours. My own dog used to get this. He was 20lb and his dose was 4.5mg every 24 hours. I rounded this to 5mg every 24 hours to make it easier for dosing. So that would be 1/2 tablet every 24 hours. There are other options for allergies as well if antihistamines are not effective but your veterinarian will have to prescribe these. Please let me know if you have any other questions and I would be more than happy to help!
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Related Answers from Veterinarians

  • Answered By Megan, DVM, CVA

    Veterinarian

    This is likely very safe to give Buddy but I would call your vet that knows Buddy’s history and to ensure you give the correct dose. Another option is Benadryl if you haven’t tried that. I have attached an article below for more information on Benadryl and dosing information. I hope this helps!

    https://www.petcoach.co/canigive/dog/benadryl/

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    0Pet Parents found this answer helpful

  • Answered By Sara Farmer, DVM

    Veterinarian

    Published on January 1st, 2020

    The appropriate dosing frequency depends on the specific type of antihistamine that was given. For example diphenhydramine is given 2-3 times daily while cetirizine is only given once daily. You could repost your question with a picture of the box of the antihistamine and we might be able to help a bit more. You may also want to have Lola examined by a vet - sometimes corticosteroids are also necessary to treat an allergic reaction.

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    1Pet Parents found this answer helpful

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