Ranking 20 Drugs and Alcohol by Overall Harm - Marijuana ranked #8 out of 20 drugs in overall harm according to a study in The Lancet, a British peer-reviewed medical journal. Alcohol ranked #1 in overall harm and harm to others. Crack cocaine had the highest score for harm to users. See our new graphs showing detailed harm rankings for alcohol, cannabis, cocaine, ecstasy, heroin, LSD, methamphetamine, and more.

New 1/12/2012

http://medicalmarijuana.procon.org/view.resource.php?resourceID=004477#LI