Syndrome of inappropriate antidiuretic hormone secretion Quiz: Ace Your Exams

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A 55-year-old man presents to the hospital with 3 days of nausea, headaches, and generalized weakness. He underwent meningioma resection 10 days ago. His immediate postoperative course was uneventful. Past medical history is significant for hypertension managed with ramipril and type 2 diabetes controlled with metformin. His temperature is 36.5°C (97.7°F), heart rate is 78/min, blood pressure is 130/70 mm Hg, respiratory rate is 16/min, and oxygen saturation is 97% on room air. Mucous membranes are moist. Neurological examination is unremarkable. Laboratory evaluation is significant for a serum sodium of 128 mEq/L and a normal potassium level. Which of the following is the best next step in management?  

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