Improving Learning-based Treatment of Cocaine Dependence With Medication

NCT ID: NCT01526538

Last Updated: 2017-02-15

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2
• Total Enrollment: 52 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2011-09-30
• Study Completion Date: 2013-03-31

Brief Summary

This study will test the efficacy of d-cycloserine in enhancing response to learning-based treatment for cocaine dependence, specifically contingency management.

Detailed Description

Cocaine dependence is a public health problem with substantial morbidity, however no effective pharmacotherapy for cocaine dependence has been approved by the FDA. Unlike previous medication studies that have sought to pharmacologically reduce cocaine reinforcement, seeking or craving, this exploratory clinical trial will test d-cycloserine (DCS) for its ability to improve learning-based behavioral treatment of cocaine dependence. DCS is an NMDA partial agonist that has been shown to robustly improve learning in preclinical models, including extinction of cocaine conditioned place preference and blockade of cocaine reacquisition, and to improve extinction-learning based exposure therapy for multiple anxiety disorders. This Phase II clinical trial will investigate the pharmacological (DCS) enhancement of a behavioral treatment combining contingency management (CM) and novel home-environment exposure therapy sessions for cocaine dependence. High magnitude CM incentives will be used to promote the cocaine abstinence necessary for extinction in home-based exposure sessions. Participants will be randomized into 2 groups: 1. CM with placebo (CM+PL), and 2. CM with DCS (CM+DCS). For 19 days after group assignment, participants will report to the laboratory 3 times per week (Mon, Wed, Fri) to provide urine samples, receive contingent vouchers, and complete assessments of drug use, craving, mood, withdrawal, and quit self-efficacy. DCS (50 mg) or placebo will be administered on Mon, Wed and Fri study visits (at the end of the lab visit before returning to the home environment for exposure sessions during the time of DCS action). Follow-up visits will be conducted at 1 week, 1 month, and 3 months post-CM completion, during which time measures of drug use (self-reported and urinalysis), craving, mood, and withdrawal will be obtained. Comparison of continuous abstinence post-CM between the groups will be the primary outcome measure. During an initial laboratory session, a battery of learning/cognitive tasks will test for forms of learning/cognition enhanced by DCS that might contribute to the treatment effect. This project will test the efficacy of a novel intervention for cocaine dependence that was developed based on a known efficacious cocaine dependence treatment (CM), principles of extinction learning theory, and a medication shown to improve preclinical learning in general, including extinction of cocaine conditioning, and clinical learning-based exposure treatment of anxiety disorders. The study may indicate cost effective additions (home exposure sessions and DCS) to extend CM benefit after the removal of contingencies, and therefore may increase the dissemination of CM in community settings.

Conditions

COCAINE-RELATED DISORDERS

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: QUADRUPLE

Study Groups

50 mg d-cycloserine

active drug condition

Group Type: EXPERIMENTAL

d-cycloserine

Intervention Type: DRUG

50 mg d-cycloserine

Sugar pill

Inactive placebo

Group Type: PLACEBO_COMPARATOR

sugar pill

Intervention Type: DRUG

placebo

Interventions

d-cycloserine

50 mg d-cycloserine

Intervention Type: DRUG

sugar pill

placebo

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• 18-60 years of age (> 60 due to age-related effects on cognitive functioning)
• Satisfy DSM-IV criteria for cocaine dependence (primarily crack)
• Able to complete all study measures
• Currently seeking treatment for cocaine dependence

Exclusion Criteria

• Meets DSM-IV criteria for dependence on a drug other than cocaine or nicotine (may meet abuse criteria for other drugs)
• Pregnant, breast feeding, or planning to become pregnant within 3 months
• If female, do not agree to use an effective means of birth control during the course of treatment (via phone screen)
• History of seizure disorder, severe hepatic impairment, porphyria, serious head trauma, dementia, or significant cognitive impairment
• Diagnosis of current major psychiatric disorder besides substance dependence or abuse
• Reported use of DCS in the past year
• Illiteracy, as will be determined during in-person screening
• Concurrently prescribed or using ethionamide or isoniazid (both used to treat tuberculosis)
• Positive urine result for opioids at screening interview

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 60 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

National Institute on Drug Abuse (NIDA)

NIH

Sponsor Role: collaborator

Johns Hopkins University

OTHER

Sponsor Role: lead

Responsible Party

Matthew Johnson

Assistant Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Behavioral Pharmacology Research Unit

Baltimore, Maryland, United States

Countries

United States

References

Johnson MW, Bruner NR, Johnson PS, Silverman K, Berry MS. Randomized controlled trial of d-cycloserine in cocaine dependence: Effects on contingency management and cue-induced cocaine craving in a naturalistic setting. Exp Clin Psychopharmacol. 2020 Apr;28(2):157-168. doi: 10.1037/pha0000306. Epub 2019 Aug 1.

Reference Type: DERIVED

PMID: 31368770 (View on PubMed)

Other Identifiers

R21DA029823

Identifier Type: NIH

Identifier Source: org_study_id

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