Inclusion Criteria:

• Meets criteria for current diagnosis of alcohol dependence.
• Subjects used more than 15 standard alcohol drinks (average)/week with at least 1 day of 5 or more drinks in the past 30 days.
• Successful completion of medical detoxification.
• Lives within a commutable distance to the Treatment Research Center and agrees to follow-up visits.
• Understands and signs the informed consent.

Exclusion Criteria:

• Current diagnosis of any substance dependence other than alcohol, nicotine, or marijuana.
• Evidence of opiate use in the past 30 days.
• Current treatment with psychotropic medications, including disulfiram (Antabuse) (excluding short-term use of benzodiazepines for detoxification).
• History of unstable or serious medical illness, including need for opioid analgesics.
• Severe physical or medical illnesses such as AIDS, active hepatitis, significant hepatocellular injury as evidenced by elevated bilirubin levels, and current severe psychiatric symptoms.
• Use of an investigation medication in the past 30 days.
• Female subjects who are pregnant, nursing, or not using reliable method of contraception.