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- Apr 3, 2015
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My kitty, Mischa, who is now at least 13 years old, had been diagnosed with hyperthyroidism about 2 months ago. She couldn't tolerate the methimazole pill; constant vomiting and diarrhea. So now my vet has prescribed the methimazole gel and for about 6 weeks she was doing well. Last night she started vomiting again and also this morning. Then 10 minutes after I applied the gel this morning she vomited again (just mucousy stuff). Had not eaten anything before. Just wondering what I could be doing wrong. I am contemplating doing the radioactive iodine treatment ($1500). I had a cat previously who took the methimazole without problems until methimazole no longer worked. Then I had her get the radioactive iodine treatment which worked well. Does anyone have any helpful thoughts?