Petco Text Logo
Petco Pet Logo
  • Two Easy Ways to Start Earning Rewards!

    rewards header
    Become a member today!
    Members-only pricing and offers, personalized care notifications, Vital Care points back on every purchase and more!
    Petco Pay LogoBecome a credit card member today!

    Earn 2X Pals Rewards points at Petco
    when you use Petco Pay!

    APPLY NOW
    Learn More About Petco Pay Benefits

How much Benadryl should I give my 5-pound puppy for allergies?

Updated on September 23rd, 2025

Pet's info: Dog | Shetland Sheepdog | Male | 2 months and 8 days old

How much benadryl for 5 pound puppy

1 Answer

Most Helpful Answer

Destini R. Holloway, DVM

Answered By Destini R. Holloway, DVM

Veterinarian

Published on March 6th, 2016

The calculation for Benadryl is quite simple, it just 1mg per lb , so for a 5 lb dog it would be around 5mg. Since Benadryl comes in 25mg usually this is close to 1/4 tablet and there is a wide safety margin for Benadryl so 1 or 2 mg above or below is well tolerated. Expect some drowsiness just like in humans.
Vote Icon54Pet Parents found this answer helpful

Smart Picks for Smart Questions

Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Share

Styled arrow button