비아그라에 대한 자세한 참고 사항

PDE3 is included in control of cardiac contractility. Sildenafil is simply about 10-fold as strong for PDE5 when compared to PDE6, an enzyme located in the retina which can be involved with the phototransduction pathway from the retina. This lessen selectivity is considered the basis for abnormalities linked to coloration eyesight [see Pharmacodyna