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. Author manuscript; available in PMC: 2010 Mar 29.
Published in final edited form as: Addict Biol. 2009 Jul 24;14(4):419–430. doi: 10.1111/j.1369-1600.2009.00162.x

Figure 5.

Figure 5

Effects of CP94253 (5.6 mg/kg, s.c.) on the cocaine self-administration dose-response function expressed as the mean number of reinforcers in a 2-hour test session ± standard error of the mean (SEM). Animals (n = 8/group) were tested twice at each dose of cocaine presented in descending order, receiving vehicle (squares) pre-treatment 15 minutes prior to one test, and CP94253 (triangles) 15 minutes before the other test, with order of presentation counterbalanced. * Represents a difference from CP94253 pre-treatment test day (Newman–Keuls, P < 0.01)