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Functional Magnetic Resonance Imaging of Opioid Withdrawal in Healthy Human Volunteers

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified February 2012 by Larry Fu-nien Chu, Stanford University.
Recruitment status was:  Enrolling by invitation
Information provided by (Responsible Party):
Larry Fu-nien Chu, Stanford University Identifier:
First received: October 30, 2009
Last updated: February 13, 2012
Last verified: February 2012
Opioid medications are commonly used for pain relief. When given over time, physical dependence can occur. This results in unpleasant side effects--such as agitation and nausea--if opioid medications are suddenly stopped. However, we do not know how withdrawal affects the brain. We know that a medication named Ondansetron can help ease or prevent symptoms associated with opioid withdrawal. Through imaging of the brain by fMRI, we hope to see how opioid withdrawal, with and without the administration of ondansetron, affects brain activity.

Condition Intervention
Substance-Related Disorders Drug: Ondansetron

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Triple (Participant, Care Provider, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: fMRI Imaging of Opioid Withdrawal in Healthy Human Volunteers

Resource links provided by NLM:

Further study details as provided by Larry Fu-nien Chu, Stanford University:

Primary Outcome Measures:
  • fMRI Scan [ Time Frame: 120 minutes ]

Secondary Outcome Measures:
  • Objective Opioid Withdrawal Scale [ Time Frame: 125 and 135 minutes ]
  • Subjective Opioid Withdrawal Scale [ Time Frame: 125 and 135 minutes ]
  • Cold Pressor Test [ Time Frame: 125 and 135 minutes ]
  • Blood Samples for Genetic Testing [ Time Frame: 125 and 135 minutes ]
  • Heat Pain Test [ Time Frame: 125 to 135 minutes ]

Estimated Enrollment: 10
Study Start Date: November 2010
Estimated Study Completion Date: June 2012
Estimated Primary Completion Date: June 2012 (Final data collection date for primary outcome measure)
Intervention Details:
    Drug: Ondansetron
    In this cross-over study, the blinded patient will receive saline placebo in one session and ondansetron in the other. The order is decided with a randomization table. If ondansetron is randomly chosen, an 8mg IV Bolus will be given at the start of the study for 30 minutes by the unblinded investigator.

Ages Eligible for Study:   18 Years to 35 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria

  • Patients will be healthy male volunteers, ages 18-35.

Exclusion Criteria

  • Females were excluded due to menstrual cycle modulation of opioid response.
  • We will exclude individuals with Raynaud's disease or a history of coronary artery disease.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01006707

United States, California
Stanford University School of Medicine
Stanford, California, United States, 94305
Sponsors and Collaborators
Stanford University
Principal Investigator: Dr Larry Fu-nien Chu Stanford University
  More Information


Responsible Party: Larry Fu-nien Chu, Associate Professor of Anesthesia, Stanford University Identifier: NCT01006707     History of Changes
Other Study ID Numbers: SU-10212009-4200
Study First Received: October 30, 2009
Last Updated: February 13, 2012

Additional relevant MeSH terms:
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Gastrointestinal Agents
Dermatologic Agents
Serotonin Antagonists
Serotonin Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Antipsychotic Agents
Tranquilizing Agents
Central Nervous System Depressants
Psychotropic Drugs
Anti-Anxiety Agents processed this record on September 19, 2017