ATI RN
Herzing University NSG160 Questions
Question 1 of 1
What is Spironolactone’s mechanism of action?
Correct Answer: A
Rationale: Spironolactone acts as a potassium-sparing diuretic by competitively inhibiting aldosterone binding at mineralocorticoid receptors in the distal convoluted tubules and collecting ducts. This reduces sodium reabsorption and water retention while conserving potassium. The observed mild diuresis with maintained potassium levels demonstrates effective aldosterone antagonism. Unlike loop or thiazide diuretics, spironolactone minimizes potassium loss and is especially beneficial in patients with heart failure, cirrhosis, or hyperaldosteronism.
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