# A Lancet Psychiatry Study Found No Evidence Cannabinoids Treat Anxiety, PTSD > **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637) > **Publisher:** CED Clinic (https://cedclinic.com) > **Canonical URL:** https://cedclinic.com/cannabinoid-efficacy-anxiety-ptsd-lancet-study/ > **Published:** 2026-03-24T16:08:56-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T11:57:45-04:00 > **Clinical Summary:** This Lancet Psychiatry study reviews cannabinoid efficacy anxiety PTSD and finds no strong evidence supporting treatment benefits. --- ✦ New CED Clinical Relevance  #70Notable Clinical Interest  Emerging findings or policy developments worth monitoring closely. ⚒ Cannabis News  |  CED Clinic Mental HealthPtsdAnxietyEvidence-Based Medicine[Clinical Research](https://cedclinic.com/cannabis-based-therapies-smoking-cessation/) Why This Matters This Lancet Psychiatry finding directly challenges widespread clinical cannabis use for anxiety and PTSD, conditions that represent significant portions of medical cannabis patient populations. The study’s negative results demand recalibration of evidence-based recommendations for these common presentations. Clinical Summary A systematic review published in Lancet Psychiatry found insufficient evidence supporting cannabinoid efficacy for [anxiety disorders](https://cedclinic.com/adolescent-cannabis-use-and-anxiety-research/) and PTSD. This contradicts prevalent clinical practice patterns where these conditions frequently drive medical cannabis recommendations. The review likely examined randomized controlled trials and found the evidence base lacking in rigor or consistency. This creates tension between research findings and real-world clinical experience with cannabis patients reporting symptomatic improvement. Dr. Caplan’s Take “This study reminds us that patient-reported benefits and rigorous evidence are different standards entirely. We need better studies, not fewer cannabis options for patients who’ve found relief through careful clinical cannabis programs.” Clinical Perspective 🧠 Clinicians should distinguish between absence of evidence and evidence of absence when counseling patients. This review doesn’t prove cannabinoids are ineffective for anxiety or PTSD, but confirms we lack high-quality trial data. For patients currently benefiting from cannabis for these conditions, discontinuation based solely on this review would be premature without individualized risk-benefit assessment. 💬 Join the Conversation Have a question about how this applies to your situation? [Ask Dr. Caplan →](https://benjamincaplan.com/ask-dr-caplan) Want to discuss this topic with other patients and caregivers? [Join the forum discussion →](https://cedclinic.com/interact/discussion-forums/forum/cannabis-industry/) Have thoughts on this? Share it: [𝕏 Share on X](https://twitter.com/intent/tweet?text=Just%20read%20this%20on%20CEDclinic.com%3A%20A%20Lancet%20Psychiatry%20study%20found%20no%20evidence%20cannabinoids%20treat%20anxiety%2C%20PTSD.%20In...%20%40drcaplan&url=https%3A//www.facebook.com/timesunion/posts/a-lancet-psychiatry-study-found-no-evidence-cannabinoids-treat-anxiety-ptsd-in-n/1432721798870561/)[in Share on LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A//www.facebook.com/timesunion/posts/a-lancet-psychiatry-study-found-no-evidence-cannabinoids-treat-anxiety-ptsd-in-n/1432721798870561/)[🦥 Share on BlueSky](https://bsky.app/intent/compose?text=Just%20read%20this%3A%20A%20Lancet%20Psychiatry%20study%20found%20no%20evidence%20cannabinoids%20treat%20anxiety%2C%20PTSD.%20In...%20--%20via%20%40drcaplan.bsky.social%20https%3A//www.facebook.com/timesunion/posts/a-lancet-psychiatry-study-found-no-evidence-cannabinoids-treat-anxiety-ptsd-in-n/1432721798870561/)[📷 Follow on Instagram](https://www.instagram.com/drbenjamincaplan/)[📝 Read more on Substack](https://substack.com/@doctorapproved)[🔔 Subscribe via RSS](https://cedclinic.com/category/cannabis-news/feed/) 📰 Source: [https://www.facebook.com/timesunion/posts/a-lancet-psychiatry-study-found-no-evidence-cannabinoids-treat-anxiety-ptsd-in-n/1432721798870561/](https://www.facebook.com/timesunion/posts/a-lancet-psychiatry-study-found-no-evidence-cannabinoids-treat-anxiety-ptsd-in-n/1432721798870561/) Table of Contents - [FAQ](#FAQ)[What is the clinical relevance rating of this cannabis news?](#What_is_the_clinical_relevance_rating_of_this_cannabis_news) - [What mental health conditions does this cannabis research focus on?](#What_mental_health_conditions_does_this_cannabis_research_focus_on) - [Is this research considered evidence-based medicine?](#Is_this_research_considered_evidence-based_medicine) - [Why is this cannabis news considered “new” and noteworthy?](#Why_is_this_cannabis_news_considered_8220new8221_and_noteworthy) - [What type of healthcare professionals should pay attention to this information?](#What_type_of_healthcare_professionals_should_pay_attention_to_this_information) - [Related](#Related) ## FAQ #### What is the clinical relevance rating of this cannabis news? This article has been assigned CED Clinical Relevance #70, which indicates “Notable Clinical Interest.” This rating suggests the content contains emerging findings or policy developments that healthcare professionals should monitor closely. #### What mental health conditions does this cannabis research focus on? Based on the article tags, this research primarily focuses on PTSD and [anxiety disorders](https://cedclinic.com/adolescent-cannabis-use-and-anxiety-research/). These are key mental health conditions where [cannabis-based treatments](https://cedclinic.com/cannabis-medical-clinic-experience-beyond-smoking-vaping/) are being investigated for therapeutic potential. #### Is this research considered evidence-based medicine? Yes, the article is tagged with “Evidence-Based Medicine,” indicating it presents scientifically rigorous research. This suggests the findings are based on systematic clinical studies rather than anecdotal reports. #### Why is this cannabis news considered “new” and noteworthy? The article is marked as “New” content with notable clinical interest, suggesting it contains recent developments in [cannabis research](https://cedclinic.com/pediatric-cannabis-certification-care-children/). This indicates emerging findings that could influence clinical practice or treatment guidelines. #### What type of healthcare professionals should pay attention to this information? This information is particularly relevant for mental health professionals, psychiatrists, and clinicians treating PTSD and anxiety disorders. The CED Clinic designation suggests it’s aimed at healthcare providers considering cannabis-based treatment options. {“@context”: “https://schema.org”, “@type”: “NewsArticle”, “headline”: “A Lancet Psychiatry study found no evidence cannabinoids treat anxiety, PTSD. In NY, any …”, “url”: “https://www.facebook.com/timesunion/posts/a-lancet-psychiatry-study-found-no-evidence-cannabinoids-treat-anxiety-ptsd-in-n/1432721798870561/”, “datePublished”: “2026-03-23T13:24:12Z”, “about”: “lancet psychiatry study found no evidence”} [https://cedclinic.com/contact/](https://cedclinic.com/contact/) Physician-Led, Whole-Person Care A doctor who takes the time to truly understand you. Personal care that starts with listening and is guided by experience and ingenuity. Health, Longevity, Wellness One-on-One Cannabis Guidance Metabolic Balance [Leave a Message](https://cedclinic.com/contact/) [Metabolic Care](https://cedclinic.com/metabolic/metabolic-how-it-works/) [Medical Consulting](https://cedclinic.com/book/) [Cannabis Care](https://cedclinic.com/book/) [https://cedclinic.com/contact/](https://cedclinic.com/contact/) RELATED READING AT CED CLINIC Continue exploring the evidence [Major review finds “very little evidence” for cannabis treating anxiety, PTSD, or psychotic …](https://cedclinic.com/cannabis-efficacy-anxiety-ptsd-review/) Explore a comprehensive review confirming limited evidence for cannabis in treating anxiety and PTSD. [Read the review](https://cedclinic.com/cannabis-efficacy-anxiety-ptsd-review/) [Huge study finds no evidence cannabis helps anxiety, depression, or PTSD | Catherine Adenle](https://cedclinic.com/cannabis-efficacy-mental-health-conditions-study/) A large-scale study reinforcing the lack of evidence for cannabis efficacy in anxiety and [PTSD treatment](https://cedclinic.com/cannabis-and-ptsd-treatment-memory-loss-benefits/). [Learn more](https://cedclinic.com/cannabis-efficacy-mental-health-conditions-study/) [Two newly released analyses of existing research have found no evidence that marijuana is …](https://cedclinic.com/cannabis-efficacy-anxiety-depression-no-evidence/) Recent analyses highlight the absence of conclusive evidence supporting marijuana for anxiety and PTSD. [Explore findings](https://cedclinic.com/cannabis-efficacy-anxiety-depression-no-evidence/) ### Related --- ### Verification & Medical Governance - **Lead Clinical Author:** Benjamin Caplan, MD - **Credentials:** Board Certified in Family Medicine (ABFM), Founder & CMO CED Clinic & CED Foundation, Author of *The Doctor-Approved Cannabis Handbook* (Penguin Random House). - **Clinical Scale:** 350,000+ lifetime evaluations overseen; 81,008-patient Real-World Evidence Registry (`~/.ced_rwe_vault.db`); 125,000+ peer-reviewed study literature observatory (`http://localhost:8768/api/explorer/terminal`). - **License Verification:** Commonwealth of Massachusetts License #240562 (https://checkahealthlicense.mass.gov/). - **NPI Registry:** 1962722637 (https://npiregistry.cms.hhs.gov/provider-view/1962722637). - **Ethics & Data Privacy:** Clinical registry observations adhere strictly to HIPAA Safe Harbor de-identification (45 CFR § 164.514(b)) and criteria for secondary research exemption under 45 CFR § 46.104(d)(4).