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My cat ate another cat's methimazole and prednisolone. Is he okay?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 4 years and 10 months old | 15 lbs

My cat accidentally took my other cats pills. 2.5mg of methimazole and 1.25mg of prednisolone.

1 Answer

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on September 20th, 2018

That should not cause any damage or severe toxic effect. I would just monitor him at this stage but I would definitively recommend a veterinary check up if you notice diarrhoea, vomiting, lethargy or inappetence. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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