THE 2-MINUTE RULE FOR VIAGRA

Sildenafil is a powerful and selective inhibitor of cGMP-unique phosphodiesterase sort five (PDE5), which can be responsible for degradation of cGMP while in the corpus cavernosum. The molecular composition of sildenafil is comparable to that of cGMP and acts to be a competitive binding agent of PDE5 inside the corpus cavernosum, leading to additio