비아그라에 대한 5가지 간단한 설명 설명

If the cGMP is ruined because of the phosphodiesterase-5 enzyme, the erection finishes. Viagra helps prevent phosphodiesterase-5 from destroying cGMP so cGMP stays all over extended, which ends up in a more extended erection. When you have had an allergic response to Viagra or any of its substances, your doctor will likely not prescribe Viagra. Yo