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Add on Study on Δ9-THC Treatment for Posttraumatic Stress Disorders (PTSD) (THC_PTSD)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified September 2012 by Hadassah Medical Organization.
Recruitment status was:  Active, not recruiting
Information provided by:
Hadassah Medical Organization Identifier:
First received: August 25, 2009
Last updated: October 28, 2012
Last verified: September 2012

Stress Disorder (PTSD) is a chronic and debilitating anxiety disorder which is widespread in every social level and is very prevalent in outpatient and inpatient settings.

A recent open-label study showed that the synthetic cannabinoid receptor agonist Nabilone had beneficial effects abolishing or greatly reducing nightmares that persisted in spite of treatment with conventional PTSD medications. Furthermore, a big number of patients suffering from chronic PTSD report using smoked marijuana because its tranquilizing effect and sleep quality improvement. According to clinical and epidemiological data different derivates from the cannabis plant are illegally and pervasively consumed by PTSD patients in order to reduce distress.

The aim of the proposed study is to broaden the previous observations and to measure the extent to which Δ 9-THC will bring to significant improvement on the full spectrum of PTSD symptoms.

Condition Intervention Phase
Posttraumatic Stress Disorders
Drug: Tetrahydrocannabinol
Other: Placebo
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Official Title: Double Blind, Placebo-Controlled Trial of THC as add-on Therapy for PTSD

Resource links provided by NLM:

Further study details as provided by Hadassah Medical Organization:

Primary Outcome Measures:
  • Clinician Administered PTSD Scale [ Time Frame: Baseline and end o ftreatment ]

Secondary Outcome Measures:
  • Nightmare Frequency Questionaire Score [ Time Frame: Baseline Weeks 3 &6 (EOS) ]

Estimated Enrollment: 70
Study Start Date: October 2009
Estimated Study Completion Date: April 2013
Estimated Primary Completion Date: October 2012 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: ACTIVE THC
Subjects will take 5MG of THC in 6 drops of olive oil orally.
Drug: Tetrahydrocannabinol
Five mg. of THC in 6 drops of olive oil orally twice a day for 6 weeks.
Placebo Comparator: Placebo
Subjects will take 6 drops of olive oil orally twice a day from an identical vial than those in the active arm
Other: Placebo
Subjects will take 6 drops of olive oil orally twice a day from an identical vial than those in the active arm


Ages Eligible for Study:   19 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Outpatients between the 19-60 years of age with a diagnosis of PTSD.
  • Women must not be currently pregnant and must use a reliable method of contraception for the duration of the study.
  • Subjects must be on stable medication (4 weeks minimum) for their PTSD (symptomatic despite current treatment), must be able to provide written informed consent, must be able adequately understand and comply with the study's instructions and protocol .

Exclusion Criteria:

  • Those not meeting the inclusion criteria and those not able to give informed consent.
  • Women who are currently pregnant or nursing.
  • Those at immediate risk of harming self or others; those who have a clinically significant medical illness or other significant psychiatric illness;
  • currently abusing alcohol or drugs;
  • currently being treated with an investigational medication or medication that is contraindicated with cannabinoids;
  • have a known allergy to cannabis-based products.
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Please refer to this study by its identifier: NCT00965809

Hadassah Medical Organization
Jerusalem, Israel, 91120
Sponsors and Collaborators
Hadassah Medical Organization
  More Information

Responsible Party: Arieh Y. Shalev, M.D. / Head, Department of Psychiatry, Hadassah University Hospital Identifier: NCT00965809     History of Changes
Other Study ID Numbers: THC09
Study First Received: August 25, 2009
Last Updated: October 28, 2012

Additional relevant MeSH terms:
Stress Disorders, Traumatic
Stress Disorders, Post-Traumatic
Trauma and Stressor Related Disorders
Mental Disorders
Physiological Effects of Drugs
Psychotropic Drugs
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Cannabinoid Receptor Agonists
Cannabinoid Receptor Modulators
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Hormones, Hormone Substitutes, and Hormone Antagonists processed this record on April 27, 2017