Cannabis Legalization and Detection of Tetrahydrocannabinol (THC) in Injured Drivers

A recent study funded by the Canadian Institutes of Health Research found that after cannabis legalization, the prevalence of moderately injured drivers with a THC level of at least 2 ng per milliliter in participating British Columbia trauma centers more than doubled. The increase was largest among older drivers and male drivers. During the study period, 4339 drivers (3550 before legalization and 789 after legalization) met the inclusion criteria. Before legalization, a THC level greater than 0 was detected in 9.2% of drivers, a THC level of at least 2 ng per milliliter in 3.8%, and a THC level of at least 5 ng per milliliter in 1.1%. After legalization, the values were 17.9%, 8.6%, and 3.5%, respectively.

You can read the full study published in the New England Journal of Medicine here: https://www.nejm.org/doi/full/10.1056/nejmsa2109371

For more information on the International Academy on the Science and Impact of Cannabis, and to join, please visit www.IASIC1.org.

Visit the IASIC Library here (https://iasic1.org/library/). The IASIC Library is intended as a user-friendly reference of the published medical literature.

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