| Groups | ED 1 | ED 2 -7 | ED 8 - 10 | ED 11 |
1 | Control | Saline | Saline | Washout | Saline |
2 | 3.0 mg/kg cocaine | Saline | 3.0 mg/kg cocaine | Washout | 3.0 mg/kg cocaine |
3 | 7.5 mg/kg cocaine | Saline | 7.5 mg/kg cocaine | Washout | 7.5 mg/kg cocaine |
4 | 15.0 mg/kg cocaine | Saline | 15.0 mg/kg cocaine | Washout | 15.0 mg/kg cocaine |