Telismart H Tablet combines two medications that help to manage high blood pressure. It is typically used when one medication fails to adequately regulate blood pressure. Telismart H Tablet consists of two medications: telmisartan and hydrochlorothiazide. 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. Hydrochlorothiazide is a diuretic (water pill) that increases urine production, decreasing 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.