비아그라 - 개요
VIAGRA contains sildenafil, which is similar medicine found in A further drug named REVATIO. REVATIO is employed to treat a exceptional sickness named pulmonary arterial hypertension (PAH).Sildenafil boosts the result of NO by inhibiting phosphodiesterase sort 5 (PDE5), that is responsible for degradation of cGMP inside the corpus cavernosum. Silde