Key Points

1. Driving under the influence of cannabis has been identified as a public health concern as medical and recreational cannabis availability increases in some countries.
2. A recent randomized clinical trial found similar levels of acute driving impairment with THC-dominant cannabis and with a combination of THC-CBD equivalent cannabis using on-road driving tests that provided real-world conditions; however, CBD-dominant cannabis did not produce significant cognitive or psychomotor impairment compared with placebo in this trial.
3. Media coverage of this study conveyed the findings as CBD-dominant cannabis not causing driving impairment while THC-dominant cannabis does, with the latter lasting up to 4 h post-dose.
4. It is recommended that clinicians counsel about the risks of driving impairment when patients disclose use of cannabis products containing THC.

Complete Research PDF

Also See
Cannabis use altering key functions like three-dimensional vision
“Medicinal” Cannabis & Driving – is it an Issue?