Systematic Review Finds Mixed Results for Cannabis in PTSD, With Possible Benefits for Specific Symptom Clusters
Across 14 studies of cannabis and PTSD, evidence was mixed for overall symptom improvement but suggested possible benefits for re-experiencing and arousal symptoms, while patients with comorbid cannabis use disorder showed consistently worse outcomes.
Quick Facts
What This Study Found
Of 10 studies in non-CUD samples, 5 suggested benefits and 5 showed no effect or worsening. Four studies found benefits for cluster B (re-experiencing) and cluster E (arousal/reactivity) symptoms. All 3 CUD studies reported worsening.
Key Numbers
14 studies; 5/10 showed benefits for overall symptoms in non-CUD; 4 showed benefits for clusters B and E; 3/3 CUD studies showed worsening.
How They Did This
Systematic review of PubMed, PsycINFO, and EMBASE for studies of cannabis in patients with PTSD using validated measures, January 1990-February 2023. 14 studies met criteria.
Why This Research Matters
Many PTSD patients use cannabis. The finding that comorbid CUD consistently worsened outcomes while targeted symptom relief appeared in non-CUD users suggests the relationship depends on use patterns.
The Bigger Picture
The divergence between controlled cannabis use (mixed but some benefits) and cannabis use disorder (consistently harmful) may reflect the dose-response curve seen across cannabis research.
What This Study Doesn't Tell Us
Mixed study designs. Few studies overall (14). Cannot standardize across different cannabis products.
Questions This Raises
- ?Which cannabinoid formulations and doses are most effective for PTSD clusters B and E?
- ?Does CUD worsen PTSD through cannabis-specific mechanisms or general addiction burden?
Trust & Context
- Key Stat:
- CUD patients: worsened outcomes in all 3 studies
- Evidence Grade:
- Systematic review with appropriate methodology, limited by small number of studies and mixed designs.
- Study Age:
- 2024 publication reviewing studies through February 2023
- Original Title:
- A Systematic Review of the Clinical Effects of Cannabis and Cannabinoids in Posttraumatic Stress Disorder Symptoms and Symptom Clusters.
- Published In:
- The Journal of clinical psychiatry, 85(1) (2024)
- Authors:
- Rodas, Justyne D(3), George, Tony P(23), Hassan, Ahmed N(2)
- Database ID:
- RTHC-05659
Evidence Hierarchy
Frequently Asked Questions
Does cannabis help with PTSD?
Results are mixed. 5 of 10 studies in people without cannabis use disorder showed benefits, particularly for re-experiencing and hyperarousal. All 3 studies in people with comorbid CUD showed worsening.
Can cannabis make PTSD worse?
For people who develop cannabis use disorder alongside PTSD, evidence consistently points to worse outcomes including increased suicidal ideation and violent behavior.
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Cite This Study
https://rethinkthc.com/research/RTHC-05659APA
Rodas, Justyne D; George, Tony P; Hassan, Ahmed N. (2024). A Systematic Review of the Clinical Effects of Cannabis and Cannabinoids in Posttraumatic Stress Disorder Symptoms and Symptom Clusters.. The Journal of clinical psychiatry, 85(1). https://doi.org/10.4088/JCP.23r14862
MLA
Rodas, Justyne D, et al. "A Systematic Review of the Clinical Effects of Cannabis and Cannabinoids in Posttraumatic Stress Disorder Symptoms and Symptom Clusters.." The Journal of clinical psychiatry, 2024. https://doi.org/10.4088/JCP.23r14862
RethinkTHC
RethinkTHC Research Database. "A Systematic Review of the Clinical Effects of Cannabis and ..." RTHC-05659. Retrieved from https://rethinkthc.com/research/rodas-2024-a-systematic-review-of
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.