Hello! I am Mack from USA age 55. I was a heavy drinker for years and I think this has led to erectile dysfunction in me now. Can this happen and could it be permanent? Also please do tell me if I stop drinking will I return back to normal? I am really afraid and worried. How about using ED drugs like Viagra and Cialis for curing ED. I have heard about http://www.canadadrugdepo.com.