Figure 3

The mean proportion of change in the oral dose of methadone, normalized using the baseline data (week 0 = 100%) of each patient in the Memantine and Placebo groups after 12 weeks of treatment.
The mean proportion of change in the oral dose of methadone, normalized using the baseline data (week 0 = 100%) of each patient in the Memantine and Placebo groups after 12 weeks of treatment.