Endocrine Pharmacology USMLE Step 1 Practice Question
A 42-year-old woman with refractory Graves disease presents with tachycardia (HR 118/min), tremor, and heat intolerance. She began propylthiouracil one month ago. Pre-operative labs show TSH 0.1 mIU/L and free T4 8.2 ng/dL (still elevated). Her blood pressure is 148/92 mmHg. Before scheduled thyroidectomy, an additional agent is prescribed to acutely block thyroid hormone release and decrease gland vascularity. She denies iodine allergy. Which drug was most likely added?
Answer choices
- APotassium iodideCorrect answer
- BRadioactive iodine
- CPropylthiouracil
- DLevothyroxine
- EMethimazole
- FSodium perchlorate
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