Spironolactone (
Aldactone) is a diuretic. It helps you make more urine and to lose excess 
water from your body. This medicine is used to treat 
high blood pressure, and 
edema or swelling from heart, kidney, or 
liver disease. It is also used to treat patients who make too much 
aldosterone or have 
low potassium. It is more popular than comparable drugs. It is available in generic and brand versions. Generic spironolactone  is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower.