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. Author manuscript; available in PMC: 2008 Nov 25.
Published in final edited form as: Psychopharmacology (Berl). 2002 May 1;162(2):178–185. doi: 10.1007/s00213-002-1079-1

Fig. 2.

Fig. 2

Effects of nicotine (0.15, 0.3 and 0.6 mg/kg, s.c.) pretreatment on the mean (±SEM) number of cocaine infusions (% baseline) on a progressive ratio (PR) schedule of reinforcement obtained before 1 h of non-reinforcement (n=6). Asterisks denote a significant difference from saline treatment (P<0.05) and # denotes a significant difference from the highest dose of nicotine (0.6 mg/kg; P<0.05; Tukey’s HSD after one-way, repeated-measures ANOVA)