Loop Diuretics · Pharmacology

A patient presents with muscle weakness and an EKG showing U-waves. Which electrolyte abnormality caused by loop diuretics is most likely?

  1. Hyperkalemia
  2. Hypokalemia
  3. Hyponatremia
  4. Hypercalcemia
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Correct answer: Hypokalemia

Loop diuretics increase the delivery of sodium to the distal collecting duct, where it is exchanged for potassium and hydrogen ions. This increased secretion of potassium frequently leads to hypokalemia if not supplemented.

Difficulty: Medium Question 10 of 20

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