Microdialysis samples were collected through probes targeting the NAc shell from rats administered vehicle or galnon (2, 5, or 10 mg/kg, i.p.), and injected with cocaine (10 mg/kg, i.p.) during behavioral testing (see Fig. 1). Shown are (A) experimental timeline, (B) mean ± SEM extracellular DA levels (% baseline) for vehicle (n=8) and galnon 2 mg/kg (n=7) across all time points, (C) mean ± SEM AUC for total post-cocaine extracellular DA levels, and (D) probe placements.