Figure 2From: Effect of duration of postherpetic neuralgia on efficacy analyses in a multicenter, randomized, controlled study of NGX-4010, an 8% capsaicin patch evaluated for the treatment of postherpetic neuralgia Percent change from baseline in "average pain for the past 24 Hours" NPRS scores by week. Values shown are mean and standard error of the mean (SEM). NGX-4010 showed greater improvement in pain scores at weeks 1 through 8 but the differences between the two groups diminished over time largely due to continued improvement in the control group.Back to article page