비아그라에 대한 주요 지침
At single oral doses of 100 mg and 200 mg, transient dose-similar impairment of colour discrimination was detected using the Farnsworth-Munsell one hundred-hue check, with peak consequences near the time of peak plasma levels. This acquiring is consistent with the inhibition of PDE6, and that is associated with phototransduction while in the retina