비아그라에 대한 확실한 가이드
At solitary oral doses of one hundred mg and 200 mg, transient dose-associated impairment of coloration discrimination was detected using the Farnsworth-Munsell 100-hue exam, with peak effects near the time of peak plasma ranges. This getting is in keeping with the inhibition of PDE6, which can be linked to phototransduction while in the retina.Maj