Question: After three and a half years with a hyperactive thyroid is there any point to continue taking Methimazole or would it be better to switch to something else, like radioactive iodine?
Dr. Hibberd's answer:
Methimazole is usually taken for one to three years to try to induce remission for hyperactive thyroid. As with all medications, side effects do occur, and most of us would favor radioactive iodine once it is clear that remission is not evident because it is simple, effective and inexpensive.
I do not usually favor Methimazole use for more than 3 years. Relapse in treated hyperthyroidism after years of Methimazole is usually best managed with radioactive iodine or surgery.
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