THE GREATEST GUIDE TO VIAGRA

Sildenafil is often a strong and selective inhibitor of cGMP-precise phosphodiesterase variety 5 (PDE5), which happens to be responsible for degradation of cGMP while in the corpus cavernosum. The molecular structure of sildenafil is similar to that of cGMP and functions like a aggressive binding agent of PDE5 in the corpus cavernosum, causing much