Opioid Dependence Clinical Trial
Official title:
Biomarkers of Disease and Response to Treatment in Opioid Addiction
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.
This study is using blood oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) to examine the brain predictors of adherence and outcomes of opioid antagonist therapy. Opioid-dependent intravenous heroin users are offered up to 3 monthly injections of the extended-release naltrexone (XRNTX) contingent upon successful outpatient non-opioid detoxification, with an additional 4 weeks of follow up. Brain responses to heroin-related pictures are recorded using fMRI prior to the 1st XRNTX injection and approximately 2 weeks thereafter the 1st XRNTX injection. Primary clinical variables include the number of injections (maximum of 3) accepted by participants, change in self-reported craving for opioids after exposure to drug-related visual cues during the brain fMRI sessions, urine levels of ten commonly abused substances and self-report of cigarette use. ;
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