Review Question - QID 215137

A 68-year-old man presents to clinic reporting several months of fatigue, malaise, cold intolerance, dry skin, and weight gain. He denies any recent infectious symptoms. His past medical history is notable for atrial fibrillation, hypertension, and hyperlipidemia. His daughter manages his medications; he is reportedly compliant with his medications but is unsure about which specific medications he takes. His temperature is 36.5°C (97.7°F), blood pressure is 136/89 mmHg, pulse is 90/min, respirations are 16/min, and oxygen saturation is 96% on room air. Physical exam reveals an interactive, but tired-looking man. His serum thyroid stimulating hormone (TSH) is 9 µU/L and free thyroxine (T4) is 2 µg/dL. Which of the following medications could have caused his current condition?