Effects of METH on monoamine levels in the NAc.

The values represent means + SEM (ng/mg tissue) per group saline-pretreated and saline-challenged (SS) (n = 4); saline-pretreated and METH-challenged (SM) (n = 8); METH-pretreated and saline-challenged (MS) (n = 9); and METH-pretreated and METH-challenged (MM) (n = 9). ap<0.05; bp<0.01 in comparison to the SS group; cp<0.05 in comparison to the MS group. No significant differences were observed between the SM and MM groups.