비아그라를 위한 5가지 간단한 기술

PDE3 is included accountable for cardiac contractility. Sildenafil is only about 10-fold as strong for PDE5 when compared with PDE6, an enzyme located in the retina that's linked to the phototransduction pathway from the retina. This decreased selectivity is considered the basis for abnormalities connected with coloration vision [see Pharmacodynami