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Chronic hyponatremia thiazide — USMLE Step 3 MCQ

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ModerateInternal Medicine (chronic management)Chronic hyponatremia thiazideUSMLE Step 3

A 76-year-old woman started hydrochlorothiazide 3 weeks ago. She has mild fatigue but is alert. Sodium is 126 mEq/L, serum osmolality is low, and urine sodium is elevated. She has no seizures or severe symptoms. Which of the following is the most appropriate at this time?

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Correct answer: AStop hydrochlorothiazide and correct sodium gradually

Thiazide-associated hyponatremia is managed by stopping the drug and correcting sodium cautiously; rapid correction is reserved for severe symptoms and risks osmotic demyelination.

Reference: Endocrine Society/European Hyponatremia Guidance