Outcomes of Opioid Addicted Prisoners With Extended-Release Injectable Naltrexone

Extended Release Naltrexone is currently marketed in the US for use in adults with alcohol dependence. It will be administered in this study at the currently marketed dose of 380 mgs. Subjects will be randomized to receive one injection of 380 mg of extended release naltrexone, at baseline, before they leave the prison, or either 380 mg of extended release naltrexone after they are released from prison. Both groups will receive three additional monthly doses of 380 mgs while enrolled in intensive outpatient treatment for six months. Subjects will also receive weekly psychosocial counseling.