VIAGRA includes sildenafil, which is the same medicine present in An additional drug referred to as REVATIO. REVATIO is used to deal with a uncommon sickness identified as pulmonary arterial hypertension (PAH).Tadalafil is 14-fold a lot more powerful for PDE5 than for PDE11A1 and forty-fold more strong for PDE5 than for PDE11A4, two on the four rec