Figure 8. Circadian timing influences efficacy of (+)-Naltrexone on relative change in conditioned chamber time.

There was a significant effect of pretreatment on alcohol-induced conditioned place preference time with mice in the dark cycle exhibiting a significant reduction between saline and (+)-Naltrexone in conditioned place preference time. All data was analysed using a two-way ANOVA with Tukey post hoc. Summary values represented as mean±SEM; n=8, *p < 0.05. saline# = saline conditioned mice.