비아그라는 무엇을 의미합니까?

VIAGRA has sildenafil, which is identical drugs located in another drug termed REVATIO. REVATIO is employed to treat a unusual condition named pulmonary arterial hypertension (PAH).The effect on one of the key close factors, maintenance of erections after penetration, is proven in Determine 6, to the pooled final results of five fastened-dose, dose