비아그라 더 이상 미스터리

PDE3 is included in control of cardiac contractility. Sildenafil is only about 10-fold as strong for PDE5 in comparison to PDE6, an enzyme present in the retina which happens to be involved in the phototransduction pathway on the retina. This lower selectivity is considered the basis for abnormalities connected with coloration vision [see Pharmacod