Single injection of NAC causes analgesia in the CCI model of neuropathic pain. (A), Mechanical allodynia analysis of CCI mice (14 days after surgery). In (A) mice were treated i.p. with a single injection of NAC (100 mg/kg) or saline preceded, 15 min earlier, by saline or LY341495 (1 mg/kg). In (B), mice were treated i.p. with saline or NAC for 7 days. Either saline or LY341495 (1 mg/kg) were injected i.p. 15 min prior to the last injection of NAC or saline. In both (A) and (B), values are means ± SEM of 11 mice per group. p < 0.05 (Two-way ANOVA + Holm-Sidak’s test) vs. the respective groups of sham operated (SO) mice (*), or vs. all other groups of CCI mice (#).