VIAGRA THINGS TO KNOW BEFORE YOU BUY

Sildenafil is actually a strong and selective inhibitor of cGMP-distinct phosphodiesterase type 5 (PDE5), which is answerable for degradation of cGMP during the corpus cavernosum. The molecular structure of sildenafil is analogous to that of cGMP and acts as being a competitive binding agent of PDE5 during the corpus cavernosum, leading to more cGM