TABLE 3

ED50 values for phenyltropanes in decreasing rates of responding maintained by cocaine injection (0.32 mg/kg per injection) or food presentation (three pellets/presentation)

ED50 values reported in milligram per kilogram with 95% confidence limits in parentheses.

TreatmentCocaineFood PresentationRelative Potency
RTI-3363.92 (3.42–4.53)10.9 (6.77–24.5)0.255* (0.101–0.510)
RTI-3713.33 (3.06–3.63)8.21 (5.30–15.6)0.377 (0.181–0.703)
  • * Value is only an estimate as there were significant effects of preparations and a significant deviation from parallel.