세부 정보, 허구 및 비아그라
Viagra is often a model-name Variation in the generic drug sildenafil. It’s a phosphodiesterase variety five (PDE5) inhibitor. PDE5 is really an enzyme that regulates particular chemical substances with your blood, but as a consequence of its effect on the body, it could make it more challenging for you to get and keep an erection.The majority of