A new study found “no significant impact” on driving ability after smoking CBD-rich marijuana and no effects on vital signs, even as all the study participants exceeded the legal limit for THC in their blood.
For the pilot study conducted in Switzerland, 33 participants were each given a joint containing 500 mg of tobacco and either 500 mg of CBD-rich marijuana (16.6 percent total CBD; 0.9 percent total THC) or 500 mg of a placebo containing a product called Knaster Hemp, a nicotine-free and cannabinoid-free herbal mixture with a hemp aroma. Researchers then used multiple common DUI tests.
As the Swiss market for CBD products has exploded in recent years, the authors wished to investigate the efficacy of CBD-rich tobacco smoking cessation products and their impact on driving safety.
According to the researchers, the “purpose of the current study was to inform recommendations for warnings on tobacco substitute products containing CBD-rich marijuana and to provide information for drivers regarding the possible risks of consuming CBD-rich marijuana. To the best of our knowledge, the current study is one of the first to investigate the potential impact of smoking CBD-rich marijuana for road safety.”
The results revealed no significant differences between the effects of smoking CBD-rich marijuana and placebo on reaction time, motor time, behavior under stress or concentration performance.