Baltimore, Maryland 21224

  • Related Disorders


The purpose of this study is to assess the efficacy of tryptophan vs. placebo, and voucher payments vs. a control condition, in the treatment of cocaine dependence.

Study summary:

This clinical trial uses a 2 by 2 design to compare tryptophan to placebo, and voucher incentives vs. a control condition, in the outpatient treatment of cocaine dependence- using a relapse prevention model of treatment intervention.


Inclusion Criteria: - Cocaine dependent Exclusion Criteria: - Physically dependent on drugs of abuse other than cocaine - Significant medical or psychiatric illness (besides substance abuse disorder) - Pregnant



Primary Contact:

Principal Investigator
Eric C Strain, M.D.
Johns Hopkins University

Backup Contact:


Location Contact:

Baltimore, Maryland 21224
United States

There is no listed contact information for this specific location.

Site Status: N/A

Data Source:

Date Processed: April 03, 2020

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