비아그라에 대한 이 보고서 검토

If the cGMP is ruined via the phosphodiesterase-five enzyme, the erection ends. Viagra stops phosphodiesterase-5 from destroying cGMP so cGMP stays about longer, which results in a more extended erection. This information is for informational uses only and is not intended for being a substitute for professional clinical suggestions, analysis or re