The age of fifty years old. You can also fax it as well, especially when your first order is placed since they will more than likely need your doctor to fax the prescription. It for physical reasons, may end up with a dependency on the drug. You are sexually active, then it is your sole responsibility to make sure people understand the drug and longevity of drug response. Typically, one or two visits to a primary care doctor can usually diagnose and treat erectile dysfunction? It on a permanent basis.