비아그라에 대한 새로운 단계별 지도
At one oral doses of 100 mg and 200 mg, transient dose-linked impairment of colour discrimination was detected using the Farnsworth-Munsell a hundred-hue examination, with peak results close to the time of peak plasma degrees. This acquiring is according to the inhibition of PDE6, which happens to be involved with phototransduction inside the retin