1 interaction related to potassium-sparing diuretic
Spironolactone is a mineralocorticoid receptor antagonist that blocks aldosterone-driven potassium excretion in the collecting duct, causing the kidneys to retain potassium. Adding a potassium supplement, salt substitute, or potassium-rich diet on top of spironolactone can produce fatal hyperkalemia, especially in patients with chronic kidney disease, heart failure, diabetes, or who are also on an ACE inhibitor or ARB.