Harold Urschel, Research Across America, Dallas, Texas
Published in the Journal of Psychopharmacology, November 25, 2009

• Immediately following the first 3 infusions, the combined craving score decreased by 54% in the treatment group, compared to a 35%  decrease in the placebo group.
  
• Positive urine drug screens were statistically significantly lower for the OnTrak group overall. On any given day, the OnTrak subjects had a lower proportion of positive urine drug screens.
  
• Consecutive clean urines represent a longer abstinence period. Two consecutive clean urines in the four week study occurred in 42% of the treated subjects and 27% of the placebo subjects, which was statistically significant.
• The reduction in craving was highly correlated with predicting use within this study. This is consistent with literature on the importance of cravings in driving use.
  

OnTrak- treated subjects had a lower percent of methamphetamine use by self-report.