Triamterene may preserve lymphocyte magnesium and potassium in patients with congestive heart failure

Electrolyte abnormalities are a frequent and potentially hazardous complication in the treatment of patients with congestive heart failure. Medical treatment with diuretics and/or digitalis, as well as neurohumoral activation most likely initiated by the compromised cardiac function, contributes to this alteration. The addition of potassium- and magnesium-sparing diuretics (triamterence, amiloride) to therapy with frusemide or hydrochlorothiazide is of possible value in preventing intracellular electrolyte abnormalities.