Behavioral Therapy Combined With Carbidopa/Levodopa for the Treatment of Cocaine Dependence

January 4, 2016 updated by: Joy Schmitz, The University of Texas Health Science Center, Houston

Behavioral Strategies to Maximize the Efficacy of Pharmacotherapy for Cocaine Dependence: Relapse Prevention With Contingency Management Procedures

Cocaine dependence is a major public health problem; an effective primary treatment for cocaine dependent individuals has yet to be found. The purpose of this study is to examine the effectiveness of levodopa and carbidopa in treating cocaine dependent individuals. In addition, this study will examine the effects of incentive rewards for treatment compliance.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Cocaine is a strong central nervous system stimulant that is widely abused throughout the United States. Due to its widespread use, it is important to develop an effective treatment for cocaine dependence. Levodopa is a medication that is used alone or in combination with carbidopa to treat Parkinson's disease. The purpose of this study is to determine the possible interactions between behavioral interventions and carbidopa/levodopa in order to treat cocaine dependent individuals.

This study will last 12 weeks and will involve two phases. The first phase will include three therapy conditions: 1) clinical management only, 2) clinical management and relapse prevention therapy, and 3) clinical management, relapse prevention therapy, and contingency management. All of the conditions in the first phase will be evaluated incrementally under active and placebo conditions while participants receive carbidopa/levodopa.

The second phase of the study will examine the contingency management procedure applications. Each of the three contingency management procedure applications targets specific behaviors that, when reinforced, may interact with carbidopa/levodopa to produce clinical benefits. Participants will receive relapse prevention therapy combined with a contingency management procedure that targets clinic attendance, medication compliance, and cocaine abstinence. Study visits will occur weekly throughout the study. In addition, participants will complete a one-year follow-up visit.

Study Type

Interventional

Enrollment

200

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
    • Texas
      • Houston, Texas, United States, 77030
        • University of Texas Health Science Center

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 to 55 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Meets DSM-IV criteria for current cocaine dependence
  • Provides at least one positive urine test for cocaine during study screening
  • Good general health, based on a physical exam, lab tests, and an electrocardiogram
  • Reads and writes English at a sixth grade level

Exclusion Criteria:

  • Current Axis I depressive, psychotic, or anxiety disorder
  • Currently in jail
  • Pregnant or breastfeeding
  • Requires certain medications

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: Parallel Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Cocaine use

Secondary Outcome Measures

Outcome Measure
Medication compliance
treatment retention
severity of addiction-related problems

Collaborators and Investigators

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

Sponsor

The University of Texas Health Science Center, Houston

Collaborators

National Institute on Drug Abuse (NIDA)
University of Texas

Investigators

  • Principal Investigator: John Grabowski, PhD, University of Texas

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

March 1, 2000

Primary Completion (Actual)

October 1, 2007

Study Completion (Actual)

October 1, 2007

Study Registration Dates

First Submitted

September 16, 2005

First Submitted That Met QC Criteria

September 16, 2005

First Posted (Estimate)

September 22, 2005

Study Record Updates

Last Update Posted (Estimate)

January 5, 2016

Last Update Submitted That Met QC Criteria

January 4, 2016

Last Verified

January 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • NIDA-09262-9
  • DPMC (Other Identifier: NIDA)
  • P50DA009262 (U.S. NIH Grant/Contract)
  • P50-09262-9

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.

Clinical Trials on Cocaine-Related Disorders

Clinical Trials on Levodopa

Search Similar Trials

Sponsors and Collaborators

Medical Conditions

Drug Interventions

CROs by country

CROs in Nigeria

Conditions

Rare Diseases

Drug Interventions

Dietary Supplements

Sponsor/Collaborators

Locations

Subscribe