Percentage of the maximum possible effects (%MPE) of 2‐BFI alone and in combination with WAY100635 (A, n = 6), MDL100907 (B, n = 5), SB242084 (C, n = 6), WB4101 (D, n = 5), yohimbine (E, n = 6), SCH23390 (F, n = 6) or raclopride (G, n = 6) on CCI‐induced mechanical nociception. Data shown are means ± SEM.