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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Drug Alcohol Depend. 2015 Jul 13;155:243–252. doi: 10.1016/j.drugalcdep.2015.07.002

Figure 5.

Figure 5

A) Number of earned infusions across 15 acquisition sessions for rats receiving pre-session i.p. injections of either TCP (1 mg/kg) or saline 1-hr and 23-hrs before the self-administration session. Rats responded for either 10 μg/kg/infusion nicotine or saline. There was a significant main effect of day (p < 0.05), a main effect of group (p < 0.05), and day X group interaction (p < 0.05). Average infusions over the last three sessions of self-administration (shown in inset) revealed that rats responding for nicotine and receiving TCP 1-hr or 23-hrs before the session earned significantly more infusions than all other groups (p < 0.05, represented by *), except each other.