Spironolactone is a prescriptive drug used in the treatment of edema and hypokalemia. Spironolactone is also used to prevent absorption of too much salt and controlling potassium levels in the body.Spironolactone works by obstructing the action of aldosterone hormone in the body. Spironolactone is found in a class of medicines known as potassium-sparing diuretic. It works by blocking the activities of aldosterone hormone. Spironolactone is a prescription drug used to treat hyperaldosteronism, a condition characterized by the production of too much aldosterone. Aldosterone is a naturally occurring hormone produced by the adrenal glands to help control the salt and water in the body. Spironolactone is also used to treat edema caused by conditions such as the liver disease, congestive heart failure, hypertension or nephrotic syndrome. Additionally, Spironolactone is prescribed to patients diagnosed with hypokalemia (low potassium levels in the blood). Spironolactone is a diuretic pill that works by preventing the body from absorbing too much salt and reducing the intensity of symptoms such as the inability to breathe.