On average, chlorthalidone lowers systolic blood pressure (the top blood pressure number) by about 12 mm Hg. It lowers diastolic blood pressure (the bottom blood pressure number) by about 4 mm Hg.
Remember, this is just an average. Your blood pressure may go down more or less than this.
It is important to lower your blood pressure because it lowers your chances of heart disease, stroke, and death. Chlorthalidone is one of the medicines doctors may recommend to treat high blood pressure.
Less Pressure, More Health!