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. Author manuscript; available in PMC: 2020 Aug 20.
Published in final edited form as: Psychopharmacology (Berl). 2006 Nov 10;190(2):145–155. doi: 10.1007/s00213-006-0610-1

Figure 4. Effects of repeated pretreatment with R(+)-nornicotine, S(-)-nornicotine or saline pretreatments on S(-)-nicotine self-administration across 10 sessions.

Figure 4.

Data are expressed as mean (± SEM) number of S(-)-nicotine infusions earned. All groups received saline pretreatment on sessions 11 and 12. #denotes significant difference from 5.6 mg/kg S(-)-nornicotine group, p < 0.05.