Bendroflumethiazide is primarily used as a diuretic to treat hypertension (high blood pressure) and edema (fluid retention) associated with conditions such as heart failure, liver cirrhosis, or kidney disorders. It works by increasing the excretion of sodium and water through the kidneys, which helps reduce blood volume and, consequently, lowers blood pressure. This medication is often prescribed as part of a long-term management plan for hypertension, sometimes in combination with other antihypertensive drugs. Additionally, it may be used to prevent kidney stone formation in certain patients by reducing calcium excretion in the urine. Due to its diuretic effect, it is also occasionally employed in managing mild to moderate fluid retention. Patients are typically advised to monitor their electrolyte levels, particularly potassium, as prolonged use can lead to imbalances.