A 63-year-old man had been on amiodarone therapy
200 mg/day for approximately 2 years for recurrent angina
pain secondary to paroxysmal atrial fibrillation despite control
of ventricular rate. He was referred to the endocrinology
department for concerns of hyperthyroidism diagnosed
during routine follow-up of thyroid function monitoring
related to his exposure to amiodarone. He reported a 19-
pound weight loss in the past year, some of it intentional, and
worsening of a hand tremor that he had for years. He denied
any other symptoms of hyperthyroidism.