비아그라에 대한 확실한 가이드

When the cGMP is destroyed with the phosphodiesterase-5 enzyme, the erection finishes. Viagra stops phosphodiesterase-5 from destroying cGMP so cGMP stays all-around for a longer period, which ends up in a more extended erection. This facts is for informational reasons only and is not meant to generally be a substitute for Experienced clinical sug