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Emerg Med (Fremantle). 2002 Sep;14(3):296-303.

Cannabis and driving: a new perspective.

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Health Promotion Unit, Central Coast Health, PO Box 361, Gosford, New South Wales 2250, Australia.


Cannabis and driving is an emerging injury-prevention concern. The incidence of driving while affected by cannabis is rising in parallel with increased cannabis use in the community. Younger drivers are at particular risk. Improvements in research methodology, technology and laboratory testing methods have occurred in the last 10 years. These cast doubt on earlier results and conclusions. Studies now show that cannabis has a significant impairing effect on driving when used alone and that this effect is exaggerated when combined with alcohol. Of particular concern is the presence of cannabis as the sole psychoactive drug in an increasing number of road fatalities and the lack of any structural response to this problem. A review of testing methods, laboratory and real driving studies, and recent epidemiological studies is presented. Suggestions for methods of further data collection and future public policy are made.

[Indexed for MEDLINE]

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