- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02517424
Evaluating Safety and Efficacy of Cannabis in Participants With Chronic Posttraumatic Stress Disorder
March 19, 2020 updated by: Tilray
Placebo-Controlled, Triple-Blind, Crossover Study of the Safety and Efficacy of Three Different Potencies of Vaporized Cannabis in 42 Participants With Chronic, Treatment-Resistant Posttraumatic Stress Disorder (PTSD)
The purpose of this study is to evaluate the safety and efficacy of vaporized cannabis in participants with chronic, treatment-resistant posttraumatic stress disorder.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Study Type
Interventional
Enrollment (Actual)
6
Phase
- Phase 2
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
British Columbia
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Kelowna, British Columbia, Canada, V1V 1V7
- University of British Columbia
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Meet DSM-5 criteria for chronic PTSD of at least six months duration.
- Have PTSD of moderate severity as measured by a score of >= 40 on the PCL-5 at the time of baseline assessment.
- Have treatment resistant PTSD defined as meeting DSM-5 diagnostic criteria for PTSD after failing on, or being unable to tolerate, Health Canada-approved medication or empirically supported psychotherapy for PTSD of adequate dose and duration, as determined on a case-by-case basis by the site investigators.
- Are at least 18 years old.
- Are willing to commit to medication dosing and delivery method, to completing evaluation instruments, and to attending all study visits.
- Agree to use only cannabis provided by study staff until the end of Stage 2 and agree to required cessation periods for the duration of the study.
- Report no current hazardous cannabis use, as defined by a score of < 11 on the CUDIT-R at time of screening.
- Abstain from cannabis during the 8-week baseline assessment period as biochemically verified via urine cannabinoid concentrations.
- Agree to keep all study cannabis stored in a secure location and not to share/distribute cannabis to any other individual.
- Be stable on medications and/or psychotherapy for PTSD for at least one month prior to study entry.
- Agree to report any changes in medication or psychotherapy treatment regimen during the study to study staff.
- If female and of childbearing potential, agree to use an effective form of birth control during study participation.
- Participants must be proficient in reading English, and must be able to effectively communicate with the investigators and other site personnel.
- Agree not to participate in any other interventional clinical trials during study participation.
- Agree not to donate blood from the start of study treatment to 24 hours after the last dose.
- Agree to allow the collection of his/her gender, race, and occupation to ensure that the study recruits the targeted population.
Exclusion Criteria:
- Are pregnant or nursing, or of child bearing potential and not practicing an effective means of birth control.
- Have a history of primary psychotic disorder, bipolar affective disorder, bipolar disorder with psychotic features, depressive disorder with psychotic features, borderline personality disorder, antisocial personality disorder, or positive family history (first degree relative) of psychotic disorder or bipolar affective disorder.
- Have any allergies to cannabis or contraindication for using cannabis.
- Are currently taking drugs known to be substrates for CYP 3A4 or CYP 2C19, such as amitriptyline, fentanyl, sufentanil, and alfentanil.
- Have a diagnosis of obstructive sleep apnea or a score of >3 on the STOP-Bang questionnaire (except in cases where the participant has documented evidence of not having obstructive sleep apnea OR if the participant is compliant on CPAP treatment). Documented evidence consists of a negative result for obstructive sleep apnea on the completion of a formal assessment for apnea.
- Would present a serious suicide risk as assessed by the investigators, or who are likely to require psychiatric hospitalization during the course of the study.
- Are not able to give adequate informed consent.
- Are not able to attend face-to-face visits or plan to move out of the area during the active treatment period.
- Have a positive urine drug screen for opiates (unless prescribed or contained in an over-the-counter Health Canada approved medication), methamphetamine, cocaine and amphetamines or meet the DSM-5 criteria for substance use disorder (other than caffeine or nicotine) during Stage 1 and 2 of the study.
- Have signs of ischemia (defined as ST elevation or depression) or significant arrhythmia (defined as atrial fibrillation or flutter, ventricular fibrillation or flutter) on the screening electrocardiogram.
- Have abnormal hepatic or renal function (abnormal liver function tests or elevated creatinine results on the screening laboratory reports).
- During the 8-week screening period, are diagnosed with dissociative identity disorder or an eating disorder with active purging, evidence of significant, uncontrolled hematological, endocrine, cerebrovascular, cardiovascular, coronary, pulmonary, gastrointestinal, or neurological disease;
- During the 8-week screening period, meet criteria for cannabis use disorder (4 or more of 11 DSM-5 criteria) and continued cannabis use confirmed by urine testing.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: High THC/Low CBD Cannabis
Investigational product will be administered via vaporization up to 2 grams per day as needed.
|
Dried cannabis
|
Experimental: High THC/High CBD cannabis
Investigational product will be administered via vaporization up to 2 grams per day as needed.
|
Dried cannabis
|
Placebo Comparator: Low THC/Low CBD cannabis
Product will be administered via vaporization up to 2 grams per day as needed.
|
Dried cannabis
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Change from baseline to end of Stage 1 in posttraumatic stress disorder symptoms via Clinician Administered PTSD Scale (CAPS) for Diagnostic and Statistical Manual of Mental Disorders (DSM)
Time Frame: 3 weeks
|
3 weeks
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Change in PTSD symptoms during Stage 1 using PTSD Checklist 5 (PCL 5).
Time Frame: 3 weeks
|
3 weeks
|
Change in PTSD symptoms during Stage 2 using PCL 5 checklist.
Time Frame: 3 weeks
|
3 weeks
|
Change in symptoms of anxiety in Stage 1 via the Inventory of Depression and Anxiety Scale
Time Frame: 3 weeks
|
3 weeks
|
Change in symptoms of anxiety in Stage 2 via the Inventory of Depression and Anxiety Scale
Time Frame: 3 weeks
|
3 weeks
|
Change in symptoms of depression in Stage 2 via the Inventory of Depression and Anxiety Scale
Time Frame: 3 weeks
|
3 weeks
|
Change in psychosocial functioning in Stage 2 via the Inventory of Psychosocial Functioning
Time Frame: 3 weeks
|
3 weeks
|
Preference for Stage 1 vs Stage 2 cannabis using the Long-term Follow-up Questionnaire
Time Frame: 34 weeks
|
34 weeks
|
Change in PTSD symptoms via CAPS assessment over Stage 1 and 2.
Time Frame: 8 weeks
|
8 weeks
|
Change in PTSD symptoms via PCL-5 assessment during abstinence periods.
Time Frame: 2 weeks
|
2 weeks
|
Change in sleep quality via actigraphy measures
Time Frame: 10 weeks
|
10 weeks
|
Change in sleep quality via Insomnia Severity Index
Time Frame: 8 weeks
|
8 weeks
|
Change in sleep quality via Sleep Diary entries
Time Frame: 8 weeks
|
8 weeks
|
Other Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Pulse rate following controlled self-administration of investigational product
Time Frame: Day 0
|
Day 0
|
Cannabis withdrawal symptoms
Time Frame: For 2 weeks after administration period
|
For 2 weeks after administration period
|
Change in problems associated with cannabis use based on Cannabis Use Disorders Identification Test
Time Frame: 36 weeks
|
36 weeks
|
Subjective drug effect via completion of the Drug Effect Questionnaire
Time Frame: For 3 weeks in stage 1 and stage 2, respectively
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For 3 weeks in stage 1 and stage 2, respectively
|
Presence of suicidal thoughts or behaviors via Columbia Suicide Severity Rating Scale
Time Frame: 36 weeks
|
36 weeks
|
Vital signs
Time Frame: 0-10 weeks
|
0-10 weeks
|
Dosing compliance via diary entry and product returns
Time Frame: 0-10 weeks
|
0-10 weeks
|
Abstinence compliance via urine cannabinoid levels
Time Frame: -2 to 10 weeks
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-2 to 10 weeks
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
Investigators
- Principal Investigator: Zach Walsh, PhD, University of British Columbia
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
February 7, 2017
Primary Completion (Actual)
March 22, 2019
Study Completion (Actual)
March 22, 2019
Study Registration Dates
First Submitted
July 31, 2015
First Submitted That Met QC Criteria
August 4, 2015
First Posted (Estimate)
August 7, 2015
Study Record Updates
Last Update Posted (Actual)
March 23, 2020
Last Update Submitted That Met QC Criteria
March 19, 2020
Last Verified
March 1, 2020
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Mental Disorders
- Trauma and Stressor Related Disorders
- Stress Disorders, Traumatic
- Stress Disorders, Post-Traumatic
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Peripheral Nervous System Agents
- Analgesics
- Sensory System Agents
- Analgesics, Non-Narcotic
- Hormones
- Hormones, Hormone Substitutes, and Hormone Antagonists
- Psychotropic Drugs
- Hallucinogens
- Cannabinoid Receptor Agonists
- Cannabinoid Receptor Modulators
- Dronabinol
Other Study ID Numbers
- CMJP-1
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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