비아그라의 가장 좋은 측면

PDE3 is involved in charge of cardiac contractility. Sildenafil is only about ten-fold as potent for PDE5 when compared with PDE6, an enzyme located in the retina that is involved with the phototransduction pathway of your retina. This reduce selectivity is regarded as The premise for abnormalities related to colour eyesight [see Pharmacodynamics].