"In research published Friday in The Lancet magazine, David Nutt of Bristol University and colleagues propose a framework for classifying harmful substances based on the actual risks to society. Their ranking has alcohol and tobacco among the 10 most dangerous. Heroin and cocaine were most dangerous, followed by barbiturates and street methadone. Alcohol was the fifth- most harmful drug and tobacco the ninth. Cannabis came in 11th, and near the bottom of the list was ecstasy."

http://www.thestandard.com.hk/news_detail.asp?pp_cat=17&art_id=40854&sid=12808040&con_type=1