Effect of Quetiapine on Marijuana Withdrawal and Relapse

July 17, 2017 updated by: New York State Psychiatric Institute
The objective of this study is to investigate the interaction between marijuana and quetiapine, with the goal of using this information to improve marijuana treatment outcome.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The purpose of this study is to determine if quetiapine decreases marijuana relapse in a controlled lab setting. For the purposes of this model, relapse is defined as a return to marijuana use after a period of abstinence. The study will utilize an inpatient/outpatient, counter-balanced design, with each participant maintained on placebo and quetiapine (200 mg/day) for 18 days. Participants will begin taking capsules as outpatients so that the dose can be incremented prior to the inpatient phase. While inpatient, participants will have the opportunity to self-administer placebo (0.0%) or active marijuana (6.2%) 6 times per day, depending on the study day. Our laboratory model, which has distinguished the effects of a range of medications on marijuana withdrawal and relapse, will provide important information on the effect of quetiapine as a potential short-term pharmacotherapy to facilitate abstinence in the initial stages of marijuana treatment.

Study Type

Interventional

Enrollment (Actual)

20

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

  • United States
    • New York
      • New York, New York, United States, 10032
        • New York State Psychiatric Institute

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

21 years to 45 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Current marijuana use:average of 2 marijuana cigarettes per day at least 4 times per week for the past 4 weeks
  • Able to perform study procedures
  • 21-45 years of age
  • Women practicing an effective form of birth control (condoms, diaphragm, birth control, pill, IUD)
  • Normal body weight

Exclusion Criteria:

  • Current, repeated illicit drug use (other than marijuana)
  • Presence of significant medical illness (e.g., diabetes, cardiovascular disease, hypertension, clinically significant abnormalities)
  • History of heart disease or current conduction system disease as indicated by QRS duration > 0.11
  • Request for drug treatment
  • Current parole or probation
  • Pregnancy or current lactation
  • Recent history of significant violent behavior
  • Major current Axis I psychopathology (major depressive disorder, bipolar disorder, suicide risk, schizophrenia)
  • Current use of any prescription or over-the-counter medication
  • Prior allergic or otherwise serious adverse reaction to quetiapine

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: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Quetiapine (200mg/day), Marijuana (6.2%, 0.0%)

Quetiapine (200mg/day): Packaged medication in size 00 opaque capsules with riboflavin filler. Study capsules (200 mg) were administered 2 times per day ((1100 and 2300 hours).

Marijuana: Participants each received a single marijuana cigarette (provided by the National Institute on Drug Abuse) at each smoking occasion. Marijuana cigarettes were stored frozen in an airtight container and humidified at room temperature for 24 h prior to use.
Drug: Marijuana
0,6.2% THC
Other Names:
  • cannabis
Drug: Quetiapine
200 mg/day
Other Names:
  • seroquel
Placebo Comparator: Placebo, Marijuana (6.2%, 0.0%)
Marijuana: Participants each received a single marijuana cigarette (provided by the National Institute on Drug Abuse) at each smoking occasion. Marijuana cigarettes were stored frozen in an airtight container and humidified at room temperature for 24 h prior to use.
Drug: Marijuana
0,6.2% THC
Other Names:
  • cannabis
Drug: Placebo oral capsule
Other Names:
  • Riboflavin

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Measure of Relapse: Change in Puffs Chosen Between Baseline and Relapse Phase
Time Frame: Days 1-3 (Baseline) and Days 6-8 (Relapse Phase)

This is a measure of marijuana self-administration and relapse since each initial puff costs $10 and is a burden to overcome just to smoke.

Over each 3 day period, the puffs chosen by each participant is averaged for a single value.
Days 1-3 (Baseline) and Days 6-8 (Relapse Phase)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

New York State Psychiatric Institute

Collaborators

National Institute on Drug Abuse (NIDA)
Research Foundation for Mental Hygiene, Inc.

Investigators

  • Principal Investigator: Margaret Haney, Ph.D, New York State Psychiatric Institute

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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

August 1, 2008

Primary Completion (Actual)

March 1, 2009

Study Completion (Actual)

March 1, 2009

Study Registration Dates

First Submitted

August 26, 2008

First Submitted That Met QC Criteria

August 26, 2008

First Posted (Estimate)

August 28, 2008

Study Record Updates

Last Update Posted (Actual)

August 18, 2017

Last Update Submitted That Met QC Criteria

July 17, 2017

Last Verified

July 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 5685
  • 5P50DA009236 (U.S. NIH Grant/Contract)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

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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