Marijuana and Alcohol Combine to Affect Driving Performance
The February 5, 2021 issue of Psychopharmacology published data from a Canadian study assessing the effect of both THC and alcohol on driving performance. Regular users of cannabis participated in simulated driving sessions after smoking marijuana (12.5% THC) and drinking alcohol (target breath alcohol 0.08%). Researchers discovered the driving performance after ingesting both marijuana and alcohol “was significantly greater than the effect of each drug by itself.” This included the test subjects’ reaction time as well as their ability to maintain speed and lateral position. The suggested additive effect of marijuana and alcohol on driving performance is consistent with prior […]