Chlorthalidone is a medication primarily used to treat high blood pressure and fluid retention. It belongs to a class of drugs known as thiazide diuretics, which help the body eliminate excess salt and water through urine. By reducing blood volume, it can lower blood pressure and decrease the risk of heart-related issues. In addition to hypertension, chlorthalidone may be prescribed for conditions like heart failure and certain kidney disorders. It is usually taken once daily, and patients are advised to maintain a balanced diet and stay hydrated while on this medication to minimize potential side effects.