TRUSERT 80 mg contains Telmisartan, a long-acting angiotensin II receptor blocker (ARB) used to treat high blood pressure (hypertension) and reduce the risk of cardiovascular events such as heart attack and stroke. Telmisartan works by blocking the effects of angiotensin II, a hormone that causes blood vessels to constrict. By relaxing the blood vessels, it helps to lower blood pressure and improve blood flow.