Telvas H 40/12.5 Tablet contains two medications that work together to control high blood pressure. It is typically used when one medication alone is ineffective at controlling blood pressure. Lowering your blood pressure lowers your chances of having a heart attack or stroke in the future. It combines two medications, telmisartan and hydrochlorothiazide. It is typically used when one medication alone is ineffective at controlling your blood pressure. Telmisartan works by relaxing and widening blood vessels, allowing blood to flow more freely. This will cause your blood pressure to drop. Hydrochlorothiazide is a diuretic (water pill) that increases urine output and thus lowers blood pressure.Disclaimer:For More Information Contact Your Physician