NCLEX RN Exam Questions Practice Question

The client is prescribed furosemide (Lasix) for heart failure. Which laboratory value should the nurse monitor closely?

Correct Answer: A

Rationale: Furosemide, a loop diuretic, causes potassium loss, risking hypokalemia, which can lead to arrhythmias. Calcium, hemoglobin, and BUN are less directly affected.

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