Telismart-CH 40 Tablet includes two medications that help to manage high blood pressure. Lowering blood pressure reduces your chances of having a heart attack or a stroke in the future. Telismart-CH 40 Tablet is a combination of two medications, Telmisartan and chlorthalidone. It is typically used when a single medication is ineffective in managing blood pressure. Telmisartan works by relaxing and broadening your blood vessels, allowing your blood to flow more readily. This lowers your blood pressure. Chlorthalidone is a diuretic (water pill) that increases urine production, reducing blood pressure. Controlling your blood pressure reduces your risk of having a heart attack, stroke, or renal problems. To be successful, the medication must be taken on a regular basis, as prescribed. You normally don't notice any direct benefits from taking this prescription, but it works in the long run to keep you healthy.