Petco Text Logo
Petco Pet Logo

Dog had allergic reaction after deworming shot. What happened?

Updated On September 23rd, 2025

Pet's info: Dog | Rottweiler | Female | unspayed | 7 months and 11 days old | 76 lbs

I took her in to the Vet yesterday for scheduled deworming. She doesn't have worms as far as I am aware. The vet first injected her with a blackish-red liquid in her leg then asked me to administer a tablet and a half of a white tablet orally right there and then. I brought her home and by evening, she had a swollen eye and bumps all-over her body most especially in the leg she was injected and around the area of the leg. Hours later, all the bumps and swollen eye cleared. What happened?

1 Answer

Most Helpful Answer

Image profile

Answered By Andrea M. Brodie, DVM

Veterinarian

Published on January 15th, 2019

Your dog may have had an allergic reaction to thee injectable. It is hard to know, since I do not know what medication your veterinarian injected. You should find out and write this down, so that next time you can tell the vet not to use this medication as your dog had a reaction to it.

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