Suspended

Serotonin/Dopamine Antagonism of Cocaine Effect

What is being tested

Data Collection

Who is being recruted

Mental Disorders+1

+ Substance-Related Disorders

+ Cocaine-Related Disorders

From 18 to 50 Years

See all eligibility criteria

How is the trial designed

Treatment Study

Phase 2

Interventional

Study Start: January 1996

See protocol details

Summary

Principal SponsorNational Institute on Drug Abuse (NIDA)

Last updated: January 27, 2026

Sourced from a government-validated database.Claim as a partner

Study start date: January 1, 1996

Actual date on which the first participant was enrolled.

Risperidone in low doses is compared with placebo in a 6-week randomized trial. Subjects also receive supportive counseling. Outcome measure include rating of behavior, mood, drug abuse, global function, and urine toxicology.

Official TitleSerotonin/Dopamine Antagonism of Cocaine Effect

NCT00000310

Principal SponsorNational Institute on Drug Abuse (NIDA)

Last updated: January 27, 2026

Sourced from a government-validated database.Claim as a partner

Protocol

This section provides details of the study plan, including how the study is designed and what the study is measuring.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.

Conditions

Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 50 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Mental DisordersSubstance-Related DisordersCocaine-Related DisordersChemically-Induced Disorders

Criteria

Inclusion Criteria: Cocaine abuse or dependence Exclusion Criteria: Dependence on other drugs. Major psychiatric illness

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.

Study Objectives

Primary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Brown University School of Medicine

Providence, United StatesOpen Brown University School of Medicine in Google Maps

SuspendedOne Study Center