Does Cannabidiol Impair Driving?

Does Cannabidiol Impair Driving?

Driving efficiency was impaired when healthy young people breathed in vaporized cannabis with Δ 9– tetrahydrocannabinol (THC), but not marijuana that was cannabidiol (CBD)- dominant, a small randomized medical trial suggested.

At 40 to 100 minutes after vaping, the basic discrepancy of lateral position (SDLP)– a measure of lane weaving, swerving, and overcorrecting– was increased by THC-dominant cannabis ( 2.33 cm, 95%CI 0.80 -3.86, P PP>P> 0.99), compared to placebo, reported Jan Ramaekers, PhD, of Maastricht University in the Netherlands, and co-authors in JAMA


” Cannabis-induced driving impairment differs with cannabis pressures, “Ramaekers kept in mind.” Stress that are rich with THC cause driving impairment, but stress that contain CBD and no THC do not,” he told MedPage Today .” This is essential as CBD pressures might be recommended for the treatment of medical conditions.” There’s likewise a popular concept that CBD counteracts THC’s psychoactive effects, which this study shows is not the case, he included.

The findings do not support the conclusion that it’s safe to drive after taking in CBD, stated JAMA associate editors Thomas Cole, MD, MPH, and Richard Saitz, MD, Miles Per Hour, in an accompanying editorial

” Usage of CBD-dominant cannabis did not impair driving in this research study, however the authors acknowledged that the doses checked might not represent typical use and the result size for CBD-dominant cannabis might not have omitted clinically crucial disability,” they wrote.

The study involved 26 healthy occasional marijuana users, who evaluated THC-dominant cannabis (1375 mg of THC), CBD-dominant marijuana (1375 mg of CBD), THC/CBD-equivalent cannabis (1375 mg of both), and placebo.

Medical marijuana and CBD are utilized in lots of conditions, as a sleep aid or to help manage pain and/or signs in neurological conditions like Parkinson’s disease

” It’s a low dosage certainly, compared to pharmaceutical grade CBD,” Ramaekers said. “In cannabis strains that are currently sold on the free market, the amount of CBD one would consume after a single marijuana cigarette, however, is relatively low; it’s equivalent to what was dosed in the present study.

However the THC dose studied likewise might not be what’s in a cannabis cigarette. “Cannabis stress vary substantially in regards to percentage THC,” Ramaekers kept in mind. “To put it simply, there is no common cannabis joint. The higher the concentration, the less one needs to smoke to accomplish a wanted high. In today research study, we gave a dose that produced a normal-to-strong sensation of subjective high.”

The crossover trial included 4 speculative sessions– CBD, THC, THC/CBD, and placebo– scheduled at least 1 week apart. Individuals were 23 years old on average and reported using marijuana less than twice a week in the previous year but more than 10 times in their lives.

In each session, individuals waited 40 to 100 minutes after vaping, then drove an automobile over a 100- km highway circuit while preserving a consistent speed of 95 km/hour (59 miles per hour) and a constant lateral position in the right (slower) traffic lane.

Mean SDLP was computed by summing deviations in lateral position over the time of the driving test. During driving tests, the variety of lateral position worths was around 54 cm.

” THC-dominant and THC/CBD-equivalent marijuana produced a short-term problems during speculative on-road driving, as indexed by a substantial boost in SDLP determined 40 to 100 minutes following vaporization,” the researchers composed. “In contract with previous research studies including smoked cannabis or oral THC (dronabinol), this impairment was modest in magnitude and similar to that seen in chauffeurs with a 0.05%blood alcohol material (≈ 2.4-2.5 cm).”

” Chauffeurs who took in THC were usually aware that their driving suffered, although participants reported that consumption of THC/CBD was associated with less stress and anxiety, decreased strength of drug effects, and higher self-confidence to drive than THC alone,” the editorialists observed. “These findings challenge the myth that CBD ameliorates the psychoactive/psychomotor results of THC.”

” Clinicians should caution their clients that marijuana items containing equal parts CBD and THC are no less impairing than items consisting of THC alone,” Cole and Saitz added. “Furthermore, considered that alcohol is a significant preventable reason for automobile crash deaths and threat is additive with cannabis, patients ought to be advised to prevent any drinking, especially with cannabis use, prior to driving.”

The research study’s restrictions include its small sample size. Participants may not be representative of individuals who use medical CBD or frequently utilize recreational marijuana.

Last Updated December 02, 2020

  • Judy George covers neurology and neuroscience news for MedPage Today, writing about brain aging, Alzheimer’s, dementia, MS, unusual diseases, epilepsy, autism, headache, stroke, Parkinson’s, ALS, concussion, CTE, sleep, discomfort, and more. Follow



This study was funded by the Lambert Effort for Cannabinoid Therapeutics at the University of Sydney.

Researchers reported relationships with the Lambert Effort for Cannabinoid Therapeutics, National Health and Medical Research Study Council of Australia, the Australian Research Study Council, Kinoxis Rehabs, Janssen, and International Council on Alcohol, Drugs and Traffic Security.

Editorialists reported relationships with the NIH, the National Institute on Alcoholic Abuse and Alcohol Addiction, the National Institute on Substance Abuse, Philadelphia College of Osteopathic Medicine, Burroughs Wellcome Fund, Alkermes, American Society of Addiction Medication, American Medical Association, National Council on Behavioral Health Care, Kaiser Permanente, UpToDate/Wolters Kluwer, Yale University, National Committee on Quality Assurance, University of Oregon, Oregon Health and Science University, RAND Corporation, Leed Management Consulting/Harvard Medical School, Partners, Beth Israel Deaconess Healthcare Facility, American Academy of Addiction Psychiatry, Group Health Cooperative, Smart Recovery, Institute for Research Study and Training in the Addictions, Charles University in Prague, Brandeis University, Massachusetts Medical Society, International Network on Quick Interventions for Alcohol and Other Drugs, Karolinska Institutet, and ABT Corporation.

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