Telmisartan is effective and specific angiotensinⅡ receptor antagonist, which is selectively applied in AT1 receptor to prevent the angiotensinⅡ from combining with AT1 receptor. The drug can effeictive reduce systolic pressure and diastolic pressure, and can improve myocardial ischemia. Telmisartan tablets have features such as high bioavailability and long half-life period.