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New Analysis: Stoned Drivers Almost Twice As Likely To Cause Car Accident

There's no question at all that marijuana has been unfairly demonized, but it's also true that it's a mind-altering drug. And whether it's pot, alcohol or something else, the people who are using those drugs are frequently reluctant to admit their

There's no question at all that marijuana has been unfairly demonized, but it's also true that it's a mind-altering drug. And whether it's pot, alcohol or something else, the people who are using those drugs are frequently reluctant to admit their recreational choices may, at least under some circumstances, have serious negative consequences:

Drinking and driving is never a good idea, and neither is smoking pot and driving, a study finds. People who smoke marijuana within a few hours of getting behind the wheel may be almost twice as likely to cause an accident compared with those who are sober.

A review of nine studies on pot smoking and car crashes was done by researchers from Dalhousie University in Nova Scotia, Canada. The authors wrote that previous studies have been somewhat inconclusive about marijuana's effect on automobile collisions, some showing it linked with a higher risk of crashes, and some showing a lower risk.

The research included in the meta-analysis included observational studies of drivers who had been treated for serious injuries following a crash, or who had been part of a fatal crash. Those crashes took place on public roads and included at least one moving vehicle, such as a car, van, truck, motorcycle or snowmobile. Evidence of marijuana was found via blood tests or self-reported drug use. The studies represented a sample of 49,411 people.

When results from the nine studies were grouped together, the risk of driving under the influence of marijuana was nearly twice that of driving while unimpaired.

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