In today's health matters, drivers who use marijuana before getting behind the wheel run more than twice the risk of crashing.
Researchers reviewed nine prior studies looking at marijuana use and motor vehicle accidents. All but one found a higher risk of accidents in drivers who use marijuana.
Overall the risk of crashing while under the influence was more than two and a half times higher in marijuana users than non-users. At least one expert cautions on taking these findings too seriously as the study was not designed to prove cause and effect.
Study authors believe their findings need to be considered carefully as more states legalize pot for medical use.
Even though none of their data looked at medical marijuana use, which is now legal in 16 states and the District of Columbia.