비아그라에 관한 모든 것

If the cGMP is destroyed from the phosphodiesterase-5 enzyme, the erection finishes. Viagra prevents phosphodiesterase-5 from destroying cGMP so cGMP stays around lengthier, which leads to a far more prolonged erection. If a dosage is effective properly but triggers bothersome Unwanted side effects, your health care provider could counsel a decrea