Since 2002, the number of road traffic deaths in Québec has been falling steadily, even though the number of motor vehicles on the road – automobiles, in particular – has increased considerably. Nevertheless, the use of alcohol, drugs and medications is frequently cited as a cause of road traffic accidents by public authorities, since these psychoactive substances have the potential to impair driving.
The aim of this study is to present a profile of the psychoactive substances (i.e…