Medication-Induced Hypokalemia

Mechanism and Effects

Furosemide is a loop diuretic that inhibits sodium and chloride reabsorption in the ascending limb of the loop of Henle, increasing urinary excretion of potassium, which can lead to hypokalemia in patients with certain medical conditions, according to the American Thoracic Society 1
Furosemide can exacerbate CO2 retention in patients with chronic lung disease, as reported by the American Thoracic Society 1

Combination with potassium-sparing diuretics like spironolactone can help maintain normal potassium levels in patients, as recommended by the American Association for the Study of Liver Diseases 2 and the Korean Association for the Study of the Liver 3
The use of potassium-sparing diuretics with furosemide is supported by evidence from the American Association for the Study of Liver Diseases 2 and the Korean Association for the Study of the Liver 3

Spironolactone causes potassium retention and can lead to hyperkalemia in certain patient populations, according to the American Thoracic Society 1 and the Korean Association for the Study of the Liver 3
Valsartan can cause hyperkalemia rather than hypokalemia in patients, as reported by the American Academy of Pediatrics 4