아무도 비아그라에 관한 사실 제안
At one oral doses of one hundred mg and 200 mg, transient dose-similar impairment of shade discrimination was detected using the Farnsworth-Munsell a hundred-hue examination, with peak effects close to the time of peak plasma amounts. This finding is according to the inhibition of PDE6, which can be involved in phototransduction while in the retina