Marijuana, alcohol impairment compared
Smoking marijuana a couple of hours before you drive almost doubles your chances of having a serious car crash, say Canadian researchers.
The study led by Associate Professor Mark Asbridge from Dalhousie University in Halifax, is the first to review of data from drivers who had been treated for serious injuries or died in car accidents.
"To our knowledge this meta-analysis is the first to examine the association between acute cannabis use and the risk of motor vehicle collisions in real life," the researchers write in the latest issue of the British Medical Journal. Keep reading