Study Status: Enrolling by invitation
Recruit Status: Enrolling by invitation
Study Type: Interventional
Official Title: Biomarkers of Disease and Response to Treatment in Opioid Addiction
Brief Summary: This study evaluates the biological markers of treatment of opioid dependent individuals with an extended release formulation of the opioid antagonist naltrexone. The biological measures include functional MRI, blood levels of naltrexone and its metabolites, urine toxicology and behavioral tests probing various aspects of personality, memory, reward processing and attention.