This Week In The Bmj

Cannabis increases the risk of car crashes

BMJ 2005; 331 doi: (Published 08 December 2005) Cite this as: BMJ 2005;331:0-d

Driving under the influence of cannabis increases the risk of having a fatal car crash. In a population based case-control study in France (p 1371), Laumon and colleagues estimated that nearly 3% of drivers use cannabis and they are more than three times as likely to be held responsible for a fatal car crash as drivers who don't use cannabis. Cannabis use and alcohol use were similar among the French drivers (2.9% and 2.7%, respectively), but alcohol seems to be causing significantly more fatal crashes than cannabis (28.6% v 2.5%).

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