Shocking number of people who report alcohol and cannabis use drive under the influence

In the US, more than half of citizens now live in a state with a legal, regulated recreational cannabis market, with additional states having some kind of decriminalisation policy. Despite laws still being in place to prevent driving after alcohol and cannabis consumption, a recent study shows that a significant number of people are happy […]

How long cannabis affects driving ability following consumption, revealed

A new study has found that, while cannabis users may present an increased willingness to drive at 90 minutes following consumption, this may represent a false sense of security regarding driving safety. In fact, it likely takes much longer to ensure users are safe to drive. While the most intense effects of cannabis may wear […]

Canadian study finds more injured drivers with THC exposure after cannabis legalisation

A new study shows that there has been a rise in the number of drivers treated in trauma centres following a collision since recreational cannabis use was legalised in Canada. While other studies argue that cannabis legalisation hasn’t resulted in more death or injuries on the roads in the United States, a paper published in The New England […]

Blood and saliva are ‘inconsistent indicators’ when testing for THC impairment

The results of a ground-breaking study suggest that, while there is a strong relationship between blood alcohol concentration and driving impairment, blood and saliva samples are not a good indication of THC impairment. Researchers at the University of Sydney’s Lambert Initiative found that blood and saliva THC concentrations are poor or inconsistent indicators of cannabis-induced […]

Car crash deaths involving both cannabis and alcohol more than doubled

New research indicates that between 2000 and 2018, the percentage of car crash deaths in the United States involving cannabis have doubled, and the percentage of deaths involving both cannabis and alcohol, have more than doubled. According to a study published in the American Journal of Public Health, the loosening of cannabis policies in many […]

The magnitude of cognitive impairment associated with cannabis-driving

As recreational cannabis products containing significant levels of THC become more easily available, the implications of legal recreational markets have consistently been a featuring topic of discussion. As a result, a number of epidemiological and experimental studies have explored the deleterious effects of cannabis use on driving. The results of these studies suggest that THC […]