Inclusion Criteria:

1. Age 18 70

2. Subjects will meet criteria for primary alcohol dependence operationalized as follows:

   A. Meets the DSM IV criteria for alcohol dependence including loss of control over drinking (criterion 3) B. Has not had more than one previous inpatient medical detoxification

3. Consumes, on average, at least 10 standard drinks per drinking day for men and 8 drinks per day for women in the 90 days pre-screening (to select an appropriately heavy drinking population)
4. Able to maintain sobriety for four days (with or without the aid of alcohol detoxification medications) as determined by self report, collateral report, and breathalyzer measurements
5. Able to read and understand questionnaires and informed consent
6. Lives within approximately 50 miles of the study site -

Exclusion Criteria:

1. Currently meets DSM IV criteria for any other psychoactive substance dependency disorder except nicotine dependence
2. Ever abused opiates
3. Any psychoactive substance abuse, except marijuana and nicotine, within the last 30 days as evidenced by subject report, collateral report, or urine drug screen
4. Meets DSM IV criteria for current axis I disorders of major depression, panic disorder, obsessive compulsive disorder, post traumatic stress syndrome, bipolar affective disorder, schizophrenia, or any other psychotic disorder or organic mental disorder
5. Meets DSM IV current criteria for dissociative disorder or eating disorders
6. Has current suicidal ideation or homicidal ideation
7. Need for maintenance or acute treatment with any psychoactive medication including anti-seizure medications
8. Current use of disulfiram
9. Clinically significant medical problems such as cardiovascular, renal, GI, or endocrine problem that would impair participation or limit medication ingestion
10. Hepatocellular disease indicated by elevations of SGPT (ALT) and SGOT (AST) of at least 3.0 times normal at screening and/or after 5 days abstinence
11. Sexually active female of child-bearing potential who is pregnant (by urine HCG), nursing, or who is not using a reliable form of birth control
12. Has current charges pending for a violent crime (not including DUI-related offenses)
13. Does not have a stable living situation and a reliable source of collateral reporting
14. Has taken an opiate antagonist drug in the last month
15. Has taken aripiprazole in the last month or has experienced adverse effects from it at any time in the past