Does Methimazole Cause Constipation? Understanding the Thyroid Connection
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4 min read
While constipation is a documented side effect for those with hypothyroidism, the medication methimazole can indirectly be a cause by leading to an overcorrection of thyroid hormone levels. Used primarily to treat hyperthyroidism, methimazole's action can slow the thyroid to the point where symptoms of an underactive thyroid, like constipation, emerge.