Aldactone 25mg is a prescription medication containing Spironolactone as its active ingredient. Each pack contains 20 tablets of 25mg strength. This medication belongs to a class of drugs known as potassium-sparing diuretics and aldosterone antagonists. Aldactone comes in a light gray box with blue and purple accents, containing blister-packed tablets. The medication requires a prescription and should only be taken under medical supervision. Spironolactone works by blocking the effects of aldosterone, helping the body eliminate excess fluid while retaining potassium. The tablets should be stored at room temperature away from moisture and heat.