LITTLE KNOWN FACTS ABOUT VIAGRA.

This metabolite incorporates a PDE selectivity profile much like sildenafil and an in vitro potency for PDE5 somewhere around 50% from the father or mother drug. Plasma concentrations of this metabolite are around 40% of those found for sildenafil, so which the metabolite accounts for around 20% of sildenafil's pharmacologic results.The following f