비아그라에 대한 자세한 참고 사항

PDE3 is concerned in command of cardiac contractility. Sildenafil is only about ten-fold as potent for PDE5 when compared to PDE6, an enzyme found in the retina and that is involved in the phototransduction pathway in the retina. This lessen selectivity is thought to be the basis for abnormalities connected with coloration eyesight [see Pharmacodyn