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My dog is lethargic, trembling after vaccines. Should I give Benadryl?

Updated On September 23rd, 2025

Pet's info: Dog | Yorkshire Terrier | Female | spayed | 2 years and 4 months old | 6.8 lbs

My 6.8 pound Yorkie rec’d 2 vaccines today. 3 hours later she’s lethargic & trembling. How much Children Liquid Benadryl should I give her?

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on June 26th, 2019

Thanks for using Petco Pet Education Center, formerly Petcoach! While this may be a reaction to the vaccines, I would not recommend that you give her Benadryl without having her physically evaluated by a veterinarian. There are scenarios where administering this medication would be contraindicated. I would highly recommend that you have Phoebe evaluated by a veterinarian for further assessment and treatment. Best of luck!

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