Late last year, 57-year-old Marcia Bergeron ordered a package of what she thought was a generic form of the sleeping pill Ambien from an online pharmacy based in Eastern Europe. A few days after Christmas, she died from a heart arrhythmia in her British Columbia home.Her liver was contaminated with fatal doses of metals such as aluminum and arsenic. Last month, the local coroner’s office pronounced Bergeron the first casualty of counterfeit drugs purchased from the We