A 68-year-old woman taking sertraline has fatigue and mild confusion. Sodium is 126 mEq/L, serum osmolality is low, urine osmolality is high, and

Question

A 68-year-old woman taking sertraline has fatigue and mild confusion. Sodium is 126 mEq/L, serum osmolality is low, urine osmolality is high, and urine sodium is 64 mEq/L. She is euvolemic on exam. Which of the following is the most likely explanation for this patient's findings?

Accepted Answer

Syndrome of inappropriate antidiuretic hormone secretion

Answer

Diabetes insipidus

Answer

Hypertonic hyponatremia from mannitol

Answer

Primary polydipsia

Answer

Adrenal crisis with hypovolemia

Chronic hyponatremia — USMLE Step 3 MCQ

A 68-year-old woman taking sertraline has fatigue and mild confusion. Sodium is 126 mEq/L, serum osmolality is low, urine osmolality is high, and urine sodium is 64 mEq/L. She is euvolemic on exam. Which of the following is the most likely explanation for this patient's findings?