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My dog accidentally got too much penicillin. Will she be okay?

Updated on September 23rd, 2025

Pet's info: Dog | Newfoundland | Female | spayed | 115 lbs

I gave my 115lb dog 10 ml injectable penicillin by mistake will she be ok

1 Answer

Most Helpful Answer

Andrea M. Brodie, DVM

Answered By Andrea M. Brodie, DVM

Veterinarian

Published on May 21st, 2018

She will likely be ok, however she could get diarrhea since the penicillin in this 10-fold overdose likely killed every single bacterium in your dog including the good bacteria in the digestive system. Depending on whether this was a long-acting or short acting penicillin you should wait a few days and add some probiotics to her food to help reestablish a healthy intestinal flora.
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