NIDA-CSP-1019

The primary objective of this randomized controlled trial is the assessment of the efficacy of STS in reducing cocaine use in subjects with cocaine dependence (DSM-IV criteria). The hypothesis is that STS will reduce the weekly mean proportion of cocaine non-use days relative to placebo as determined by self report of use confirmed with urine assays for BE.  Secondary objectives include assessing the reduction in the overall proportion of non-use days and the proportion of subjects that achieve measured reductions in cocaine and other drugs use, the reduction in the severity of cocaine dependence and craving, and severity of depression (HAM-D), and the safety of STS in the study population.