A 28-year-old man with Tourette syndrome and ADHD maintained fitness to drive while using medical cannabis for tic management, based on clinical assessment.
neurologists treating Tourette's, medical cannabis regulators, driving authorities
What the researchers found
A patient with treatment-resistant Tourette syndrome and ADHD who was prescribed medical cannabis maintained his fitness to drive. This addresses the common concern about cannabis-impaired driving in medical cannabis patients who develop tolerance to psychoactive effects.
Why it matters
Driving restrictions are a major barrier to medical cannabis access, particularly for conditions like Tourette syndrome where cannabis may be the only effective treatment. This case contributes to the evidence that tolerance to driving impairment can develop.
The numbers in context
1 patient, age 28. Tourette syndrome + ADHD. Medical cannabis treatment. Driving fitness maintained. Treatment-resistant to conventional options.
How the study worked
Case report of a 28-year-old male with Tourette syndrome and comorbid ADHD treated with medical cannabis, with assessment of driving fitness.
What this study cannot tell us
Single case report. Cannot generalize to other patients or conditions. Driving fitness assessment methods not detailed. No comparison to driving performance without cannabis. Individual tolerance varies.
How to read the evidence
Single case report provides the lowest level of clinical evidence.
When this study was published
Recently published case report.
The bigger picture
The tension between medical cannabis efficacy and driving safety affects millions of patients worldwide. Case reports like this can inform policy discussions about how to balance treatment access with traffic safety.
Questions still open
- Do medical cannabis patients generally develop enough tolerance to drive safely?
- Should driving restrictions for medical cannabis differ from recreational use?
Common questions
Can you drive while using medical cannabis?
Does cannabis help Tourette syndrome?
Read the original research
Case Report: Effect of medicinal cannabis on fitness to drive in a patient with Tourette Syndrome and ADHD.
Frontiers in psychiatry, 16, 1595649
Citation
Streetz, Charlotte Marie; Szejko, Natalia; Pisarenko, Anna; Fremer, Carolin; Teske, Jörg; Brunnauer, Alexander; Müller-Vahl, Kirsten R. (2025). Case Report: Effect of medicinal cannabis on fitness to drive in a patient with Tourette Syndrome and ADHD.. Frontiers in psychiatry, 16, 1595649. https://doi.org/10.3389/fpsyt.2025.1595649