THE DEFINITIVE GUIDE TO VIAGRA

Sildenafil is actually a strong and selective inhibitor of cGMP-particular phosphodiesterase variety five (PDE5), which is accountable for degradation of cGMP inside the corpus cavernosum. The molecular construction of sildenafil is comparable to that of cGMP and functions to be a competitive binding agent of PDE5 while in the corpus cavernosum, le