Using cannabidiol to treat PTSD and traumatic brain injury symptoms
Official title: Cannabidiol for Treating PTSD Symptoms and Neurocognitive Impairment in PTSD and PTSD Comorbid With TBI: A Placebo-controlled RCT With Neural-circuit Centered Precision Medicine Prediction of Response.
Run by NYU Langone Health · NCT04550377 · Data updated 2026-11-12
This study is testing if taking cannabidiol (CBD) can help people with PTSD, some of whom also have mild brain injuries, feel better compared to a placebo.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 70 Years |
| Sex | All |
| Enrollment | 120 (estimated) |
| Sponsor | NYU Langone Health Academic / other |
| Locations | 1 site (New York, New York) |
| Status | Recruiting |
| Started | May 26, 2021 |
| Main results expected | March 2026 |
| Study ends | June 2026 |
| Registry record updated | February 17, 2026 |
| Trial ID | NCT04550377 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates include individuals diagnosed with PTSD, particularly those with comorbid mild traumatic brain injury.
✕Probably not a fit
Patients with moderate or severe traumatic brain injury or those with a history of substance use disorder may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial is a randomized, placebo-controlled study aimed at evaluating the efficacy of cannabidiol (CBD) in alleviating symptoms of post-traumatic stress disorder (PTSD) in individuals, some of whom also have mild traumatic brain injury (TBI). A total of 120 participants will be enrolled and divided into three groups: one receiving 400 mg of oral CBD daily, another receiving 800 mg daily, and a control group receiving a placebo. The treatment will last for 8 weeks, with the primary outcome measured by changes in PTSD symptoms using the Clinician-Administered PTSD Scale (CAPS-5). The study seeks to determine if CBD can effectively reduce PTSD symptoms compared to a placebo.
Why it matters
Potential benefit: If successful, this treatment could provide a novel therapeutic option for patients suffering from PTSD and TBI.
How similar studies have gone: While there is emerging interest in the use of cannabinoids for PTSD, this specific approach is relatively novel and has not been extensively tested in similar studies.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Meets clinical criteria for Posttraumatic Stress Disorder (PTSD) as per Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) * TBI present (for PTSD+TBI subjects only) as per American Congress of Rehabilitation Medicine (ACRM) definition * Mild TBI (for PTSD+TBI subjects only) as per Ohio State University Identification Screener * Able to provide at least 2 locators * Able to provide informed consent * Confirmation that the participant is reliably domiciled * Agreement to abstain from all other cannabinoid use for the duration of the study * Willingness to use contraception if of childbearing potential. Exclusion Criteria: * History of open head injury * TBI within the last 6 months * Moderate or Severe TBI * SUD in the last 12 months other than mild AUD or nicotine use * Use of any cannabinoid containing product within the last 1 month * Positive urine drug screen (Positive for cannabinoids, amphetamine, cocaine, opioids) * Currently prescribed medications with possible CBD-drug interactions * Lifetime history of any psychiatric disorder with psychotic features, bipolar disorder * Exposure to trauma in the last 30 days, including police duty or military service * Psychotherapy for PTSD or other psychiatric conditions initiated within 2 months of screening * Not stable for at least 2 months on psychiatric medication, anticonvulsants, antihypertensive medication, sympathomimetic medication, estrogen replacement therapy, medications associated with neurogenesis, or steroid medication * Active suicide attempt within the past year * Current significant suicidality (assessed using the C-SSRS), any significant suicidal behavior in the past 12 months, or any history of serious suicide attempts requiring hospitalization, or current significant homicidality. * Neurologic disorder or systemic illness affecting CNS function (apart from TBI) * Major medical illness (i.e. cancer or infectious disease.) * Clinical diagnosis of anemia, advised by physician to avoid blood draws * Significant laboratory abnormalities, significantly impaired hepatic function, abnormalities in complete blood count or metabolic panel * Significant allergic reactions to the drug including cannabinoids or sesame oil * Pregnancy or lactation * Contraindication to MRI * Males and females who plan to conceive a child during or two weeks following the study * Active legal problems likely to result in incarceration within 12 weeks of treatment initiation * Has a high risk of adverse emotional or behavioral reaction (e.g., evidence of serious personality disorder, antisocial behavior, serious current stressors, and lack of meaningful social support). * Inpatient psychiatric treatment in past 12 months, with the exception of detox and extended ED stays.
Where it's running
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New York University School of Medicine
New York, New York, United States Recruiting
Study contacts
- Principal investigator: Esther M Blessing, MD PhD — NYU
- Study coordinator: Esther Blessing, MD PhD
- Email: Esther.Blessing@nyulangone.org
- Phone: 646-754-4808
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.