Cannabis-based medicines show the strongest evidence for Tourette syndrome among movement and neurodegenerative disorders
A review of cannabis-based medicines in neurological disorders found the best evidence for Tourette syndrome, where THC-containing preparations improved tics and psychiatric comorbidities, with more limited evidence for Parkinson's and Huntington's disease.
Quick Facts
What This Study Found
The best evidence for cannabis-based medicine efficacy in movement/neurodegenerative disorders is for Tourette syndrome, where THC-containing preparations improved tics and psychiatric comorbidities. Limited evidence suggests benefits for Parkinson's disease (tremor, pain, sleep) and Huntington's disease (behavioral symptoms). Neuroprotective effects have been speculated but not confirmed clinically.
Key Numbers
THC-containing preparations recommended for Tourette syndrome. Limited evidence for Parkinson's (tremor, non-motor symptoms) and Huntington's (behavioral symptoms). Neuroprotective effects speculated but unconfirmed clinically.
How They Did This
Narrative review summarizing current evidence for cannabis-based medicines in selected neurological diseases, focusing on movement disorders and neurodegenerative conditions. Part of a book chapter in Current Topics in Behavioral Neurosciences.
Why This Research Matters
While cannabis-based medicines are well-established for pain and spasticity, their potential in movement and neurodegenerative disorders is still emerging. This review clarifies where the evidence is strongest and where more research is needed.
The Bigger Picture
Neurological movement disorders are often treatment-resistant, and patients frequently self-medicate with cannabis. This review provides clinicians with an evidence-based framework for discussing cannabis-based options, particularly for Tourette syndrome.
What This Study Doesn't Tell Us
Narrative review without systematic methodology. Relies on existing evidence which is sparse for most movement disorders. The chapter format may not capture all recent studies.
Questions This Raises
- ?What THC doses and formulations work best for Tourette syndrome?
- ?Could cannabis-based medicines address the psychiatric comorbidities of Parkinson's?
- ?Will the speculated neuroprotective effects ever be demonstrated in clinical trials?
Trust & Context
- Key Stat:
- Best neurological evidence: Tourette syndrome with THC-based preparations
- Evidence Grade:
- Moderate: narrative review in an authoritative book series, summarizing a mix of evidence levels across conditions.
- Study Age:
- Published 2026.
- Original Title:
- The Use of Cannabis-Based Medicine in Selected Neurological Disorders.
- Published In:
- Current topics in behavioral neurosciences, 76, 433-454 (2026)
- Authors:
- Szejko, Natalia(8), Saramak, Kamila(2), Müller-Vahl, Kirsten R(12)
- Database ID:
- RTHC-08652
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
Can cannabis help with Tourette syndrome?
This review found the strongest evidence among movement disorders for Tourette syndrome, where THC-containing cannabis-based medicines improved both tics and psychiatric comorbidities.
Does cannabis protect against neurodegeneration?
Neuroprotective effects have been speculated based on preclinical data, but this has not yet been confirmed in clinical settings for any neurodegenerative disease.
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Cite This Study
https://rethinkthc.com/research/RTHC-08652APA
Szejko, Natalia; Saramak, Kamila; Müller-Vahl, Kirsten R. (2026). The Use of Cannabis-Based Medicine in Selected Neurological Disorders.. Current topics in behavioral neurosciences, 76, 433-454. https://doi.org/10.1007/7854_2024_564
MLA
Szejko, Natalia, et al. "The Use of Cannabis-Based Medicine in Selected Neurological Disorders.." Current topics in behavioral neurosciences, 2026. https://doi.org/10.1007/7854_2024_564
RethinkTHC
RethinkTHC Research Database. "The Use of Cannabis-Based Medicine in Selected Neurological ..." RTHC-08652. Retrieved from https://rethinkthc.com/research/szejko-2026-the-use-of-cannabisbased
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.