<prompt> A 38-year-old woman presents to the clinic with new symptoms of palpitations, weight loss, and heat intolerance. On physical examination, she has a mild tremor of her outstretched hands, an enlarged thyroid, and resting tachycardia heart rate 110min. Biochemical tests confirm the diagnosis and she is started on methimazole. Which of the following is the most likely mechanism of this drug?inhibition of iodine uptakeinhibition of thyroidal organic binding and coupling reactionslowering serum calciumadrenal suppression  <response>: Methimazole is an effective treatment for hyperthyroidism Methimazole interferes with thyroid function mainly by inhibition of thyroidal organic binding and coupling reactions. In contrast to other agents such as perchlorate, the action of thioamides is not prevented by large doses of iodide. 