비아그라에 대한 편견 없는 견해

PDE3 is concerned in control of cardiac contractility. Sildenafil is simply about 10-fold as powerful for PDE5 compared to PDE6, an enzyme present in the retina which is involved with the phototransduction pathway of your retina. This reduced selectivity is considered the basis for abnormalities linked to shade eyesight [see Pharmacodynamics].VIAGR