the study below is just one of many that compared various drugs and found that alcohol is as dangerous as heroin (the latter causing less nerve damage); as far as i can remember, the roques report classified drugs into three categories according to their overall harmfulness; category 1 included alcohol, cocaine and heroin; category 2 included lsd, mdma and cigarettes; and category 3 included coffee and cannabis
but check for yourselves: Roques, B., et al.: Problèmes posées par la dangerosité des drogues. Rapport du professeur Bernard Roques au Secrétaire d'Etat à la Santé. Paris 1998.
using google i am sure you can find a summary of the report on the net;
http://www.legalisieren.at/studien/roques_report.htm (summary in german)
but check for yourselves: Roques, B., et al.: Problèmes posées par la dangerosité des drogues. Rapport du professeur Bernard Roques au Secrétaire d'Etat à la Santé. Paris 1998.
using google i am sure you can find a summary of the report on the net;
http://www.legalisieren.at/studien/roques_report.htm (summary in german)
