CBD-rich cannabis extract improved symptoms in most of 18 autism spectrum disorder patients
In an observational study of 18 autism patients using CBD-enriched cannabis extract (75:1 CBD:THC), 14 of 15 who completed treatment showed improvement in at least one symptom category, with strongest gains in seizures, ADHD symptoms, sleep, and social interaction.
Quick Facts
What This Study Found
Of 15 patients who adhered to treatment, 14 showed improvement in at least one of eight symptom categories. Nine of 10 non-epileptic patients improved 30%+ in at least one category. The strongest improvements were in seizures, ADHD, sleep disorders, and communication/social interaction deficits. Nine of 10 patients on other medications were able to reduce or withdraw them while maintaining improvements.
Key Numbers
18 patients enrolled, 15 completed (3 discontinued for adverse effects). 14/15 improved in at least one category. 9/10 non-epileptic patients improved 30%+ in at least one area. 4/10 non-epileptic patients improved 30%+ in four or more categories. 9/10 on other medications reduced or withdrew them. CBD:THC ratio 75:1.
How They Did This
Observational cohort of 18 autistic patients (10 non-epileptic, 5 epileptic, 3 discontinued) treated with compassionate-use standardized CBD-enriched cannabis extract (75:1 CBD:THC ratio) for 6-9 months, evaluating eight symptom categories.
Why This Research Matters
Autism spectrum disorder has limited pharmacological treatment options, and many existing medications have significant side effects. This is among the first published reports of CBD-rich extract specifically for autism symptoms in non-epileptic patients.
The Bigger Picture
The overlap between autism and epilepsy has led researchers to explore anticonvulsant treatments for autism. These early results suggesting CBD-rich extracts may help non-epileptic ASD patients hint at shared biological mechanisms that extend beyond seizure control.
What This Study Doesn't Tell Us
Very small sample (18 patients). No control group or blinding. Observational design subject to placebo effect and reporting bias. Non-standardized outcome measures. Three patients discontinued due to adverse effects, representing 17% attrition.
Questions This Raises
- ?Would these findings replicate in a randomized controlled trial?
- ?Which specific autism symptoms are most responsive to CBD?
- ?Is the 75:1 CBD:THC ratio optimal, or would different ratios work differently?
Trust & Context
- Key Stat:
- 14 of 15 patients improved; 9 of 10 reduced other medications while maintaining gains
- Evidence Grade:
- Preliminary: small observational study with no control group, though the consistency of improvements across categories is notable.
- Study Age:
- Published in 2019.
- Original Title:
- Effects of CBD-Enriched Cannabis sativa Extract on Autism Spectrum Disorder Symptoms: An Observational Study of 18 Participants Undergoing Compassionate Use.
- Published In:
- Frontiers in neurology, 10, 1145 (2019)
- Authors:
- Fleury-Teixeira, Paulo, Caixeta, Fabio Viegas, Ramires da Silva, Leandro Cruz, Brasil-Neto, Joaquim Pereira, Malcher-Lopes, Renato
- Database ID:
- RTHC-02038
Evidence Hierarchy
Watches what happens naturally without intervening.
What do these levels mean? →Frequently Asked Questions
Can CBD help with autism?
This small study found CBD-rich cannabis extract improved symptoms in most of 18 autism patients across multiple categories. However, without a control group, these results could partly reflect placebo effects, and larger controlled trials are needed.
Is CBD safe for autistic children?
In this study, 15 of 18 patients tolerated treatment with infrequent and mild adverse effects. Three discontinued due to adverse effects. The extract used had a specific 75:1 CBD:THC ratio under medical supervision.
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Cite This Study
https://rethinkthc.com/research/RTHC-02038APA
Fleury-Teixeira, Paulo; Caixeta, Fabio Viegas; Ramires da Silva, Leandro Cruz; Brasil-Neto, Joaquim Pereira; Malcher-Lopes, Renato. (2019). Effects of CBD-Enriched Cannabis sativa Extract on Autism Spectrum Disorder Symptoms: An Observational Study of 18 Participants Undergoing Compassionate Use.. Frontiers in neurology, 10, 1145. https://doi.org/10.3389/fneur.2019.01145
MLA
Fleury-Teixeira, Paulo, et al. "Effects of CBD-Enriched Cannabis sativa Extract on Autism Spectrum Disorder Symptoms: An Observational Study of 18 Participants Undergoing Compassionate Use.." Frontiers in neurology, 2019. https://doi.org/10.3389/fneur.2019.01145
RethinkTHC
RethinkTHC Research Database. "Effects of CBD-Enriched Cannabis sativa Extract on Autism Sp..." RTHC-02038. Retrieved from https://rethinkthc.com/research/fleury-teixeira-2019-effects-of-cbdenriched-cannabis
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.