Figure 2:
Chronic memantine time-effect function for effects on nicotine self-administration, weekly averages (mean of nicotine infusions per session ± S.E.M.). Significant (P < 0.05) memantine-induced decreases in nicotine self-administration were seen during the second week of treatment and during the week after the end of treatment. No significant effects of memantine on nicotine self-administration were seen during the first week of treatment or during the resumed treatment after a week of enforced abstinence.
