Diabetes Mellitus USMLE Step 1 Practice Question
A 58-year-old woman with metastatic lung cancer presents with confusion and nausea. Vital signs show BP 128/76 mmHg, HR 88/min, RR 14/min, temperature 37°C. Serum sodium is 118 mEq/L with normal osmolality and euvolemic examination. Urine osmolality is elevated at 520 mOsm/kg. She denies polyuria. SIADH is diagnosed. Which medication directly antagonizes the renal V2 receptor to raise serum sodium?
Answer choices
- ATolvaptanCorrect answer
- BDesmopressin
- CMethimazole
- DFludrocortisone
- EOctreotide
- FVaptivant
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