THE DEFINITIVE GUIDE TO VIAGRA

Sildenafil is a potent and selective inhibitor of cGMP-distinct phosphodiesterase style five (PDE5), and that is responsible for degradation of cGMP in the corpus cavernosum. The molecular structure of sildenafil is analogous to that of cGMP and acts for a competitive binding agent of PDE5 while in the corpus cavernosum, resulting in extra cGMP and