Ask the doctor: Blood pressure drugs and potassium
Two of the major classes, thiazide diuretics and loop diuretics, tend to lower potassium levels in the blood. But drugs in the other class, potassium-sparing diuretics, tend to raise potassium levels in the blood. Examples of these include spironolactone (Aldactone, generic) and triamterene (Dyrenium, generic).
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