VIAGRA has sildenafil, which is identical medicine present in An additional drug identified as REVATIO. REVATIO is utilized to deal with a unusual disorder identified as pulmonary arterial hypertension (PAH).Tadalafil is 14-fold additional potent for PDE5 than for PDE11A1 and 40-fold a lot more powerful for PDE5 than for PDE11A4, two on the 4 recog