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.

Fleury-Teixeira, Paulo et al.·Frontiers in neurology·2019·Preliminary EvidenceObservational
RTHC-02038ObservationalPreliminary Evidence2019RETHINKTHC RESEARCH DATABASErethinkthc.com/research

Quick Facts

Study Type
Observational
Evidence
Preliminary Evidence
Sample
N=18

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)
Database ID:
RTHC-02038

Evidence Hierarchy

Meta-Analysis / Systematic Review
Randomized Controlled Trial
Cohort / Case-Control
Cross-Sectional / ObservationalSnapshot without intervening
This study
Case Report / Animal Study

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.

Read More on RethinkTHC

Cite This Study

RTHC-02038·https://rethinkthc.com/research/RTHC-02038

APA

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.