Cocaine Dependence Clinical Trial
This project will evaluate the effect of a single sub-anesthetic dose of ketamine on the time to first cocaine use and abstinence rates in 60 treatment-seeking cocaine-dependent individuals receiving mindfulness-based relapse prevention (MBRP) therapy, using a 5 week combined laboratory-inpatient and outpatient double-blind, randomized, controlled trial.
he study will begin with an inpatient phase (phase 1) of 5 days, during which abstinence is
achieved, followed by a 4 week outpatient phase (phase 2). A single infusion of ketamine or
midazolam will occur on day 3 of Phase 1. In addition to measures of mindfulness and
impulsivity, stress sensitivity tests are incorporated into the design in order to elucidate
mechanisms of action. The study hypotheses are:
1. ketamine and MBRP will significantly increase the time to first use compared to placebo
and MBRP in cocaine-dependent individuals.
2. ketamine and MBRP is significantly more likely to lead to abstinence from cocaine (no
use over one week) as compared to placebo and MBRP.
3. ketamine and MBRP will significantly reduce subjective, endocrine, and physiological
responses to stress (including cue exposure) as compared to placebo and MBRP.
4. ketamine and MBRP will significantly increase mindfulness, as assessed by the Five Facet
Mindfulness Questionnaire (FFMQ), as compared to placebo and MBRP.
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