비아그라에 대한 새로운 단계별 지도

When the cGMP is destroyed through the phosphodiesterase-5 enzyme, the erection finishes. Viagra prevents phosphodiesterase-five from destroying cGMP so cGMP stays all over more time, which leads to a far more prolonged erection. Health professionals usually will not likely prescribe Viagra with nitrates. They are prescription drugs used to deal w