THE ULTIMATE GUIDE TO VIAGRA

Sildenafil is a strong and selective inhibitor of cGMP-precise phosphodiesterase variety 5 (PDE5), that is accountable for degradation of cGMP during the corpus cavernosum. The molecular framework of sildenafil is similar to that of cGMP and functions like a competitive binding agent of PDE5 in the corpus cavernosum, causing far more cGMP and eleva