Effectiveness of Gabapentin When Used With Naltrexone to Treat Alcohol Dependence Compared to Placebo and Naltrexone Alone

Inclusion Criteria: Meet criteria for primary alcohol dependence including loss of control of drinking No more than one previous inpatient medical detoxification Consumes on average 5 standard drinks for men and 4 standard drinks for women Able to maintain sobriety for 4 days (with or without detox medications). Able to read and understand questionnaires and Informed Consent Lives within 50 miles of the study site Exclusion Criteria: Currently meets DSM-IV criteria for any other psychoactive substance dependency disorder except nicotine dependence Ever abused opiates Any psychoactive substance abuse, except marijuana and nicotine within the last 30 days as evidenced by subject report, collateral report, or urine drug screen. Meets DSM-IV criteria for current Axis I disorder of major depression, panic disorder, obsessive-compulsive disorder, post-traumatic stress syndrome, bipolar affective disorder, dissociative disorder or eating disorder, schizophrenia, or any other psychotic disorder or organic mental disorder. Has current suicidal or homicidal ideation Need for maintenance or acute treatment with any psychoactive medication including antiseizure medications. Current use of disulfiram. Clinically significant medical problems, such as cardiovascular, renal, GI or endocrine problem that would impair participation or limit medication ingestion. 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 of abstinence. Sexually active females of child bearing potential who are pregnant (by urine HCG), nursing or who are not using a reliable form of birth control. Has current charges pending for a violent crime (not including DUI related offenses). Does not have a stable living situation and a reliable source of collateral reporting. Has taken an opiate antagonist drug in the last month. Has taken gabapentin in the last month or has experienced adverse effects from it at any time in the past.