This collection of drugs causes the blood vessels to relax, and at the same time reduced blood volume and as a result, blood vessels are dilated and blood pressure is reduced. This reduced blood pressure helps the heart to pump blood easily, it decreases oxygen demand on the heart, and improves the function of a failing heart. Furthermore, the progression of diabetes or kidney disease due to hypertension will also slowed down. In addition, angiotensin-converting enzyme is also responsible for the breaking down of bradykinin. Bryant & Knight (2007, p.299) continue by saying Therefore, because angiotensin-converting inhibitors blocks the breakdown of bradykinin, it increase the levels of bradykinin, which can contribute to the vasodilator action of angiotensin converting enzyme inhibitors.…