비아그라에 대해 알아야 할 고려 사항

Sexual stimulation that leads to an erection will cause the generation and launch of nitric oxide during the penis. Nitric oxide results in an enzyme, guanylate cyclase, to produce cyclic guanosine monophosphate (cGMP) that is primarily liable for growing and lowering the dimensions of blood vessels carrying blood to and in the penis and creating a