다른 사람들이 비아그라의 장점을 깨닫게 돕습니다

Sexual stimulation that brings about an erection causes the generation and launch of nitric oxide while in the penis. Nitric oxide brings about an enzyme, guanylate cyclase, to produce cyclic guanosine monophosphate (cGMP) that's primarily responsible for expanding and lowering the dimensions of blood vessels carrying blood to and in the penis and