HOW VIAGRA CAN SAVE YOU TIME, STRESS, AND MONEY.

Sildenafil is actually a powerful and selective inhibitor of cGMP-certain phosphodiesterase type five (PDE5), and that is responsible for degradation of cGMP while in the corpus cavernosum. The molecular construction of sildenafil is similar to that of cGMP and acts as being a competitive binding agent of PDE5 within the corpus cavernosum, leading