Figure 4.

Pain threshold after administration of codeine + placebo vs. codeine + diclofenac, corrected to baseline at t = 0 (Mean, SD, n= 12) ▪ codeine + placebo • codeine + diclofenac. B Pain tolerance after administration of codeine + placebo vs. codeine + diclofenac, corrected to baseline at t = 0 (Mean, SD, n= 12) ▪ codeine + placebo • codeine + diclofenac