비아그라에 대한 모든 것

Viagra functions by blocking PDE-5 from working. In this way, blood flow into the penis can take place and not be stopped by PDE-five. This also widens your blood vessels to allow extra blood to movement into your penis.Most of them stay in your bloodstream for about 4 to 5 hrs. Cialis is definitely the exception, as it continues to be inside your