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Naltrexone Effects on Alcohol Intake

This study has been completed.
Information provided by:
University of California, San Francisco Identifier:
First received: November 15, 2005
Last updated: April 12, 2011
Last verified: March 2011
The purpose of this study is to examine drinking behavior and decision-making while taking Naltrexone and placebo. This is a double-blind, randomized, placebo-controlled crossover study. There are two cycles: one cycle on Naltrexone and one cycle on placebo.

Condition Intervention
Social Drinker
Drug: Naltrexone

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: Naltrexone Effects on Alcohol Intake Using a Laboratory Bar in Asp40 Positive and Negative Alcohol Users Characterized by fMRI and Genetic Screening

Resource links provided by NLM:

Further study details as provided by University of California, San Francisco:

Study Start Date: February 2005
Study Completion Date: December 2006
Primary Completion Date: December 2005 (Final data collection date for primary outcome measure)
Detailed Description:
The study proposed is a 22 to 23 day, double-blind, placebo-controlled crossover study in 60 male and female moderate to heavy alcohol users who are Asp40 positive and negative. Subjects will undergo a 6 to 7-day cycle taking the first study drug (naltrexone or placebo) with an alcohol self-administration visit in the laboratory bar on the 6th or 7th day of drug. The first alcohol self-administration visit is followed by an 8 to 9 day washout period. Subjects then cross over to repeat the cycle while taking the other drug (placebo or naltrexone). On the final day (either day 8 or 9) of the first study drug cycle, the subject will undergo functional imaging (fMRI) at the WBIC. There will be at least one day in between the 'lab bar' and the fMRI scan. The first fMRI visit is followed by a 5-6 day washout period. Subjects then cross over to repeat the cycle while taking the other drug (placebo or naltrexone). Subjects will keep daily diaries of alcohol and medication use throughout the study.

Ages Eligible for Study:   21 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy volunteers who are 21-40 years of age
  • If female, 7-20 alcoholic drinks must be consumed weekly.
  • If male, 10-25 alcoholic drinks must be consumed weekly.
  • If female, must be non-lactating, not pregnant, and using a reliable contraception method (i.e. abstinence, intrauterine device [IUD], hormonal birth control, or double barrier method [male condom, female condom, or diaphragm plus a spermicidal agent such as contraceptive foam, jelly or cream]).
  • Must have a body mass index (BMI) ≥18 and ≤30.
  • Able and willing to provide an informed consent.
  • Able to understand and follow the instructions of the investigator, including the delayed discounting tasks.
  • Have a breath alcohol concentration of less than 0.02 on visits 1, 2, 3, 5, and 6; and 0.00 on visits 4, 4a, 7 and 7a.

Exclusion Criteria:

  • Positive urine drug screen
  • Using Cocaine, stimulants (other than nicotine and caffeine), methamphetamine, and/or amphetamines greater than 30 times in the last 24 months
  • Using inhalants, hallucinogens, ecstasy, and/or ketamine greater than 30 times in the last 24 months
  • Current enrollment in an alcohol, or other drug treatment program or current legal problems relating to alcohol, or other drug use, including awaiting trial or supervision by a parole or probation officer
  • Binge drinking more than three times per week (>5 standard drinks in one session is a binge)
  • Currently trying to quit alcohol use
  • Current dependence on any other psychoactive drug (except nicotine or caffeine) and/or alcohol as determined by the study physician's assessment .
  • Clinically significant medical or psychiatric illness as determined by screening blood tests, medical history, and physical exam performed by the study physician
  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: NCT00254670

United States, California
San Francisco, California, United States, 94115
Sponsors and Collaborators
University of California, San Francisco
Principal Investigator: Michael C Rowbotham, MD University of California, San Francisco
  More Information Identifier: NCT00254670     History of Changes
Other Study ID Numbers: H5612-26059
Study First Received: November 15, 2005
Last Updated: April 12, 2011

Keywords provided by University of California, San Francisco:

Additional relevant MeSH terms:
Alcohol Drinking
Drinking Behavior
Anti-Infective Agents, Local
Anti-Infective Agents
Central Nervous System Depressants
Physiological Effects of Drugs
Narcotic Antagonists
Sensory System Agents
Peripheral Nervous System Agents processed this record on May 25, 2017