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Cannabinoids, Neural Synchrony, and Information Processing (THC-Gamma)

This study is ongoing, but not recruiting participants.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00708994
First Posted: July 3, 2008
Last Update Posted: June 23, 2017
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Collaborator:
National Institute on Drug Abuse (NIDA)
Information provided by (Responsible Party):
Deepak C. D'Souza, Yale University
  Purpose
The study examines the effects of delta-9-tetrahydrocannabinol (Δ9-THC), the principal active ingredient of cannabis, on neural synchrony. Neural synchrony is studied using electroencephalography (EEG).

Condition Intervention Phase
Cannabis Psychotic Disorders Drug: THC Drug: Placebo Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Basic Science
Official Title: Cannabinoids, Psychosis, Neural Synchrony, and Information Processing

Resource links provided by NLM:


Further study details as provided by Deepak C. D'Souza, Yale University:

Primary Outcome Measures:
  • EEG [ Time Frame: +30 ]
  • Clinician Administered Dissociative Symptoms Scale, Positive and Negative Symptom Scale, Visual Analog Scale [ Time Frame: Baseline, +10, +80 ]

Estimated Enrollment: 36
Study Start Date: April 2008
Estimated Study Completion Date: December 2017
Estimated Primary Completion Date: December 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: THC
  • Very low dose (0.0015 mg/kg = 0.21 mg in a 70kg individual) THC, dissolved in alcohol. Administered intravenously over 10 minutes.
  • Low dose (0.015 mg/kg = 1.05 mg in a 70kg individual) THC, dissolved in alcohol. This dose is roughly equivalent to smoking approximately 1/4th of a marijuana cigarette, or "joint". Administered intravenously over 10 minutes.
  • Medium dose (0.03 mg/kg = 2.1 mg in a 70 kg individual) THC, dissolved in alcohol. This dose is roughly equivalent to smoking approximately 1/2 of a marijuana cigarette, or "joint". Administered intravenously over 10 minutes.
Drug: THC
  • Very low dose (0.0015 mg/kg = 0.21 mg in a 70kg individual) THC, dissolved in alcohol. Administered intravenously over 10 minutes.
  • Low dose (0.015 mg/kg = 1.05 mg in a 70kg individual) THC, dissolved in alcohol. This dose is roughly equivalent to smoking approximately 1/4th of a marijuana cigarette, or "joint". Administered intravenously over 10 minutes.
  • Medium dose (0.03 mg/kg = 2.1 mg in a 70 kg individual) THC, dissolved in alcohol. This dose is roughly equivalent to smoking approximately 1/2 of a marijuana cigarette, or "joint". Administered intravenously over 10 minutes.
Placebo Comparator: Placebo
• Control: small amount of alcohol intravenous (quarter teaspoon), with no THC over 10 minutes
Drug: Placebo
• Control: small amount of alcohol intravenous (quarter teaspoon), with no THC over 10 minutes

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 55 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Men and women aged 18 and 55 years (extremes included) on the day of the first dosing.
  • Exposed to cannabis at least once.

Exclusion Criteria:

  1. Cannabis naïve
  2. Positive pregnancy screen during screening
  3. Hearing deficits
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00708994


Locations
United States, Connecticut
VA Connecticut Healthcare System
West Haven, Connecticut, United States, 06516
Sponsors and Collaborators
Yale University
National Institute on Drug Abuse (NIDA)
Investigators
Principal Investigator: Deepak D'Souza, MD Yale University Medical School
  More Information

Responsible Party: Deepak C. D'Souza, Associate Professor, Yale University
ClinicalTrials.gov Identifier: NCT00708994     History of Changes
Other Study ID Numbers: 0803003638
5R21DA020750-02 ( U.S. NIH Grant/Contract )
First Submitted: July 1, 2008
First Posted: July 3, 2008
Last Update Posted: June 23, 2017
Last Verified: June 2017

Additional relevant MeSH terms:
Psychotic Disorders
Mental Disorders
Schizophrenia Spectrum and Other Psychotic Disorders
Ethanol
Anti-Infective Agents, Local
Anti-Infective Agents
Central Nervous System Depressants
Physiological Effects of Drugs