Fig. 2

changes of analgesia with duration (baseline (0 min), 30–90 min after intervention) in control saline group (control) acetaminophen (APAP), N-acetylcysteine (NAC) and APAP (300 mg/kg) combination with the various doses of NAC 200–600 mg/kg of (AN 200, AN 400, AN 600). In each group, data in baseline and consecutive three times were analyzed by repeated measure. The data have been reported by mean ± standard error. *; significant compare with the baseline, #; significant 90 min compare with the 30 min