Aldactone, also known as spironolactone, is a diuretic medication that works by blocking the hormone aldosterone, which helps regulate the balance of water and salt in the body. By reducing the amount of water and salt retained by the body, Aldactone helps lower blood pressure, improve heart function, and treat conditions like edema (fluid retention) and ascites (fluid in the abdomen). It is commonly used in combination with other medications to manage various conditions. Aldactone comes in tablet form and is typically taken once or twice daily as directed by a healthcare provider.