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Effects of cocaine and/or l-THP on extracellular DA in the NAc. L-THP (1, 3, 10 mg/kg) slightly elevated extracellular NAc DA. Pretreatment with l-THP dose-dependently augmented cocaine-enhanced DA in the NAc. *p<0.05, **p<0.01, ***p<0.001, when compared with baselines before l-THP administration (C) or the vehicle (for cocaine) treatment group (D). #p<0.05, when compared with the vehicle (0 mg/kg l-THP) plus cocaine treatment group (C, D).
