Aldactone, also known by its generic name spironolactone, is a medication commonly used to treat conditions such as high blood pressure, heart failure, and edema (fluid retention). The dosage you mentioned, 25 mg, is a common starting dose. Spironolactone is a diuretic, which means it helps the body get rid of excess salt and water by increasing urine production. It is also known as a potassium-sparing diuretic because it helps the body retain potassium while excreting sodium. It's important to take Aldactone 25 mg exactly as prescribed by your healthcare provider and to follow any dietary or lifestyle recommendations they provide. It's typically taken with food to enhance absorption. Side effects may include increased potassium levels (hyperkalemia), dizziness, headache, and gastrointestinal issues. If you experience any unusual or severe side effects, it's crucial to contact your healthcare provider.