Endocrine Pharmacology USMLE Step 1 Practice Question
A 26-year-old woman at 8 weeks' gestation presents with palpitations, heat intolerance, and weight loss. Vital signs show BP 138/82 mmHg, HR 108 bpm, RR 18/min, and temperature 37.8°C. Laboratory studies reveal suppressed TSH at 0.08 mIU/L and elevated free T4 at 3.2 ng/dL. Thyroid ultrasound demonstrates diffuse gland enlargement. She denies prior antithyroid medication use. Given the critical pregnancy stage, her physician selects a thionamide that also inhibits peripheral conversion of T4 to T3. Which drug was prescribed?
Answer choices
- APotassium iodide
- BMethimazole
- CRadioactive iodine
- DPropylthiouracilCorrect answer
- EPropranolol
- FLevothyroxine
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