Petco Text Logo
Petco Pet Logo

Why is my dog panting and hyper after taking thyroid medication?

Updated On September 23rd, 2025

Pet's info: Dog | Rat Terrier | Female | unspayed | 10 years old | 20 lbs

My 9 yo rat terrier with hx of hypothyroidism on thyroid medication has been panting and hyper for 3 hours straight. She had been her normal self up until today when she started panting, jumping on the couch, and following me around the house at every moment. She continues to pant and be excitable. What should I do? What’s wrong?

1 Answer

Most Helpful Answer

Image profile

Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on January 5th, 2019

I’m sorry to hear that Chloe isn’t feeling herself. Is it possible that she received a Double dose of her thyroid medication this morning? Over medication with thyroid medication can cause these symptoms. Otherwise those can all be symptoms of discomfort. If her behavior continues then I would encourage you to have her evaluated by a veterinarian soon. Sometimes abdominal pain or back pain can cause those symptoms and can be hard to identify without an examination. Best of luck and I hope she improves soon. Thank you for using Pet Coach.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

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

Sponsored