Skip to main content
OpenTrials
Active, Not Recruiting

NCT Number: NCT05630235

Effects of CBD/CBD-A Oral Extract on Resting-state EEG and Neuropathic Pain Symptoms After SCI

The main purposes of this study are to (1) measure the effect of CBD/CBD-A on pain symptoms, pain intensity, pain unpleasantness, and skin sensitivity to hot and cold temperatures; and (2) measure the effect of CBD on brain electrical activity with electroencephalography (EEG).

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Notify Me

Key information

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Men or Women;
  • 18-64 years of age with an incomplete or complete acquired traumatic SCI;
  • Must have experienced neuropathic pain for a minimum of three months before entering the study (neuropathic pain will be assessed using the International SCI Pain Classification);
  • The pain intensity must be in the moderate to severe category, which will be defined as a score of at least four on an NRS (range of 0 to 10).
  • Must have previous experience with consuming cannabis and or cannabinoids.

Exclusion criteria

  • Current drug (DAST-10: >6) or alcohol abuse (AUDIT: >10);
  • Current use of cannabis plant or cannabis products (CBD or CBD+THC) or any other drugs of abuse (unless prescribed) including alcohol;
  • Presence of significant medical illness (e.g., diabetes, obesity, cardiovascular disease, hypertension, hepatitis) or other significant neurological trauma;
  • History of or current severe psychopathology (e.g., major depressive disorder, bipolar disorder, schizophrenia, post-traumatic stress disorder) judged by the investigator to put the subject at greater risk of experiencing an adverse event;
  • Adults who are unable to consent, women who are pregnant, breastfeeding, or not practicing an effective form of birth control (condoms, diaphragm, birth control pill, IUD), and prisoners;
  • Current pregnancy. Pregnancy will be evaluated using a pregnancy test during the first study visit. Female subjects of childbearing potential will be required to use two forms of effective birth control for the 3 months prior to participating in the study and continuing for 1 month after completion of the study;
  • Have a history of renal or hepatic disease: or
  • Have elevated serum creatinine above the laboratory upper limit of normal (ULN): or
  • Have elevated serum transaminases (ALT or AST) above the ULN: or
  • Have elevated total bilirubin above the ULN; or
  • Take valproate, due increased risk of liver enzyme elevation; or
  • Currently using strong CYP2C19 and CYP3A4 inducers; or
  • Have suicidal ideation (subjects should be screened for suicidal ideation); or
  • Cannot abstain from the use of alcohol during the study period, due to increased risk of sedation; or
  • Have a known or suspected hypersensitivity to cannabidiol or tetrahydrocannabinol.
  • Have a known or suspected hypersensitivity to sesame seed oil, lecithin, or bovine gelatin.

Treatment and study plan

CBD/CBD-A

Drug

Participants will be administered a one-time dose of 204.6 mg of CBD/CBD-A orally.

Placebo

Other

The placebo equivalent of the CBD/CBD-A dose administered orally.

Primary outcomes

  1. Change in neuropathic pain intensity or unpleasantness.

    Time frame: Baseline, approximately 3 hours post intervention, and approximately 6 hours post intervention

    Assess changes in pain intensity and unpleasantness of the worst neuropathic pain using a numerical rating scale from 0-10 (0 no pain and 10 worst imaginable/unpleasant pain).

  2. Change in brain electrocortical activity at rest.

    Time frame: Baseline and 3 hours post intervention

    Assess brain electrocortical activity at rest using a 64-channel Biosemi EEG system and conducting EEG power spectrum analysis

Secondary outcomes

  1. Change in neuropathic pain symptoms severity using the NPSI.

    Time frame: Baseline, approximately 3 hours post intervention, and approximately 6 hours post intervention

    The Neuropathic Pain Symptom Inventory (NPSI) will assess the presence and severity of common neuropathic pain symptoms. Range 0-100 with higher scores representing greater neuropathic pain symptoms.

  2. Change in sensory function using QST.

    Time frame: Baseline and 3 hours post intervention

    Sensory function will be assessed using quantitative sensory testing (QST) using an FDA-approved Thermal Sensory Analyzer.

  3. Change in state anxiety using the STAI.

    Time frame: Baseline, approximately 3 hours post intervention, and approximately 6 hours post intervention

    Using the State-trait Anxiety Inventory (STAI), we will evaluate changes in momentary anxiety with scores ranging from 5-20. Higher values equate to greater anxiety symptoms.

  4. Subjective Drug Effects

    Time frame: Baseline, approximately 3 hours post intervention, and approximately 6 hours post intervention

    Drug Effects Questionnaire (DEQ): The DEQ is a brief five item instrument used to assess subjective drug effects. The five items are presented on a 100 mm visual analogue scale ranging from not at all to extremely. The participants are instructed to draw a vertical line at any place between the two responses

Sponsors and collaborators

Lead sponsor

University of Miami

Other

Collaborators

  • Consortium for Medical Marijuana Clinical Outcomes Research

Registry information

Official study title

Effects of a Hemp-derived Cannabidiol and Cannabidiolic-acid Oral Extract on Resting-state Electroencephalography and Neuropathic Pain Symptoms in People With Spinal Cord Injury

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Nov 29, 2022
Registry last updated
Jun 22, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.