My cat's thyroid is high on methimazole. What symptoms to watch for?

Question

Tony takes methimazole & his thyroid has increased from 2.4 in Feb. to 3.9 this month. My vet does not want to change his methimazole dosage b/c he has gained weight and otherwise is not showing any changes. what behavior changes should I look out for? Only change I’ve noticed in the last few weeks is that he no longer sleeps in bed with me but I have no idea if that’s a Behavior related to thyroid. He has become a little picky with his food but since he’s gained weight, vet not concerned. Pet's info: Cat | Domestic Shorthair | Male | neutered | 20 years and 4 months old | 9.5 lbs

Jennifer Summerfield, DVM CPDT-KA · Accepted Answer

Hi there. Symptoms of hyperthyroidism generally include things like weight loss, vomiting, diarrhea, excessive vocalization, and increased appetite or thirst. I would tend to agree with your veterinarian that if your kitty is not losing weight or having any other symptoms of a problem, there is no reason to change his medication dosage - although an increase may be needed in the future if he starts to have symptoms again.

My cat's thyroid is high on methimazole. What symptoms to watch for?

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