Key Findings:  Looking at actual and perceived driving impairment following cannabis consumption, this analysis finds that ad libitum users resulted in simulated driving decrements. Users were willing to drive after an hour and a half, despite impairments present up to 4 hours later.
Type of Study:  Double Blind Clinical Trial
Study Sample Size:  191
Study Result:  Negative
Research Location(s):  United States
Year of Pub:  2022
Cannabinoids Studied:  Tetrahydrocannabinol (THC)
Phytocannabinoid Source:  Unspecified
Chemotype:  Chemotype I
Route of Administration:  Inhalation
Citation:  Marcotte TD, et al. Driving Performance and Cannabis Users' Perception of Safety: A Randomized Clinical Trial. JAMA Psychiatry. 2022; 79:201-209. doi: 10.1001/jamapsychiatry.2021.4037
Authors:  Marcotte TD, Umlauf A, Grelotti DJ, Sones EG, Sobolesky PM, Smith BE, Hoffman MA, Hubbard JA, Severson J, Huestis MA, Grant I, Fitzgerald RL