A 27-Year-Old Nursing Assistant with a History of Major Depression

A 27-year-old nursing assistant with a history of major depression and bulimia is brought to the emergency department after a suicide attempt.  She claims to have ingested several diuretic pills 18 hours ago.  The patient complains of frequent, large-volume urinations that started shortly after she ingested the pills.  She has also been very thirsty but she denies nausea, vomiting, or diarrhea.  Her temperature is 36.7 C (98 F) , blood pressure is 96/60 mm Hg, pulse is 110/min, and respirations are 14/min.  Physical examination shows dry oral mucosa and reduced skin turgor.  Laboratory results are as follows: Which of the following medications did this patient most likely ingest?

A) Acetazolamide
B) Amiloride
C) Hydrochlorothiazide
D) Spironolactone
E) Torsemide

Correct Answer:

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