# Cannabinoid Clinical Trials for Insomnia: EEG Sleep Data > **Author:** Benjamin Caplan, MD (ABFM Board Certified, MA Lic. #240562, NPI: 1962722637) > **Publisher:** CED Clinic (https://cedclinic.com) > **Canonical URL:** https://cedclinic.com/cannabinoid-clinical-trials-eeg-insomnia-sleep-study/ > **Published:** 2026-03-10T17:14:41-04:00 | **Last Modified / Clinically Audited:** 2026-09-28T11:59:34-04:00 > **Clinical Summary:** Explore cannabinoid clinical trials EEG insomnia data showing how THC/CBD affects sleep architecture in insomnia patients with objective EEG measures. --- #### Clinical Takeaway In this small pilot trial of 20 adults with diagnosed insomnia, a single oral dose of 10 mg THC combined with 200 mg CBD reduced total sleep time compared to placebo. These findings suggest that at least at this dose combination, oral cannabinoids did not improve and may have disrupted objective sleep measures in insomnia patients. Larger controlled trials are needed before oral THC/CBD products can be recommended as reliable sleep aids for people with clinical insomnia. ### #9 Acute Effects of Oral Cannabinoids on Sleep and High-Density EEG in Insomnia: A Pilot Randomised Controlled Trial. **Citation:** Suraev Anastasia et al. *[Acute Effects](https://cedclinic.com/episodic-memory-cannabis-impairment-study/) of Oral Cannabinoids on Sleep and High-Density EEG in Insomnia: A Pilot Randomised Controlled Trial.* Journal of sleep research. 2026. PMID: 40631525. **Study type:** Journal Article, Randomized Controlled Trial  |  **Topic area:** Cannabidiol  |  **CED Score:** 11 Design: 5 Journal: 0 N: 0 Recency: 3 Pop: 2 Human: 1 Risk: 0 Why This Matters This pilot study provides the first high-density EEG evidence characterizing how a commonly used THC/CBD combination affects [sleep architecture](https://cedclinic.com/sleep-architecture-cannabinoids-enhancing-sleep-quality/) in patients with diagnosed insomnia disorder, addressing a significant gap between clinical use and objective neurophysiological data. The findings establish baseline safety and efficacy parameters necessary for designing larger trials and informing evidence-based dosing recommendations for cannabinoid-based sleep interventions in [clinical practice](https://cedclinic.com/cannabis-reproductive-health-women-clinical-evidence/). **Methodological Considerations:** - Self-reported outcomes — recall and social-desirability bias risk **Abstract:** Cannabinoids, particularly Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD), have gained popularity as alternative sleep aids; however, their effects on [sleep architecture](https://cedclinic.com/sleep-architecture-cannabinoids-enhancing-sleep-quality/) and next-day function remain poorly understood. Here, in a pilot trial, we examined the effects of a single oral dose containing 10 mg THC and 200 mg CBD (THC/CBD) on objective sleep outcomes and next-day alertness using 256-channel high-density EEG in 20 patients with DSM-5 diagnosed insomnia disorder (16 female; mean (SD) age, 46.1 (8.6) years). We showed that THC/CBD decreased total sleep time (-24.5 min, p = 0.05, d = -0.5) with no change in wake after sleep onset (+10.7 min, p > 0.05) compared to placebo. THC/CBD also significantly decreased time spent in REM sleep (-33.9 min, p < 0.001, d = -1.5) and increased latency to REM sleep (+65.6 min, p = 0.008, d = 0.7). High-density EEG analysis revealed regional decreases in gamma activity during N2 sleep, and in delta activity during N3 sleep, and a regional increase in beta and alpha activity during REM sleep. While there was no observed change in next-day objective alertness, a small but significant increase in self-reported sleepiness was noted with THC/CBD (+0.42 points, p = 0.02, d = 0.22). No changes in subjective sleep quality, cognitive performance, or simulated driving performance were observed. These findings suggest that a single dose of cannabinoids, particularly THC, may acutely influence sleep, primarily by suppressing REM sleep, without noticeable next-day impairment (≥ 9 h post-treatment). Australian New Zealand Clinical Trial Registry (ACTRN12619000714189) https://www.anzctr.org.au/. Clinical Perspective This pilot study provides a useful first look at how a fixed-ratio THC/CBD combination affects sleep architecture in insomnia patients using rigorous EEG methodology, yet several limitations warrant cautious interpretation. The small sample size of 20 participants, female predominance, single-dose design, and lack of detail on baseline cannabis exposure history limit generalizability and our ability to predict effects with repeated dosing or in more diverse populations. The specific 10:20 ratio tested may not reflect typical patient preferences or commercial formulations, and the absence of validated next-day cognitive or functional outcome measures leaves a critical gap regarding daytime consequences that often concern both patients and providers. That said, objective sleep architecture data from high-density EEG are more reliable than patient-reported sleep quality alone, making this work a reasonable foundation for larger trials. For now, clinicians should view cannabinoids as a potential option worth discussing with carefully selected insomnia patients who have failed or are intolerant of first-line agents, while emphasizing that  |   |  CED Clinic Blog[Why Cannabis Works](https://cedclinic.com/why-cannabis-works/) CED Clinic Blog[Smart Cannabis Dosing](https://cedclinic.com/smart-cannabis-dosing/) CED Clinic Blog[Cannabis Product Guide](https://cedclinic.com/cannabis-product-guide/) Further Reading Evidence Watch[Cannabis and Heart Health](https://cedclinic.com/cannabis-cardiovascular-health-study/) CED Clinic Blog[Why Cannabis Works](https://cedclinic.com/why-cannabis-works/) Evidence Watch[CBD and Liver Enzymes](https://cedclinic.com/cbd-liver-enzyme-elevation-study-jama-2025/) [View on PubMed ↗](https://pubmed.ncbi.nlm.nih.gov/40631525/)[Full Text ↗](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12856102/)[DOI ↗](https://doi.org/10.1111/jsr.70124) [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 [Cannabinoid Clinical Trials: Cannabis Dosing for Insomnia](https://cedclinic.com/cannabinoid-clinical-trials-insomnia/) Review dosing strategies in cannabinoid [clinical trials](https://cedclinic.com/endocannabinoid-system-emotional-memory-ptsd-treatment/) focused on insomnia treatment and outcomes. [Learn More](https://cedclinic.com/cannabinoid-clinical-trials-insomnia/) [Cannabinoid Clinical Trials: EEG Sleep Insomnia RCT](https://cedclinic.com/acute-effects-oral-cannabinoids-sleep-insomnia/) Explore randomized controlled trials using EEG to assess [cannabinoid effects](https://cedclinic.com/adolescent-cannabis-psychiatric-outcomes-2026-digest/) on insomnia sleep patterns. [Read Study](https://cedclinic.com/acute-effects-oral-cannabinoids-sleep-insomnia/) [Cannabinoid Clinical Trials: Sleep & EEG Insomnia Study](https://cedclinic.com/cannabinoid-clinical-trials-sleep-eeg-insomnia-study/) Detailed analysis of cannabinoid impact on sleep architecture in insomnia patients using EEG data. [Discover Insights](https://cedclinic.com/cannabinoid-clinical-trials-sleep-eeg-insomnia-study/) Have thoughts on this? 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