^*NFP group showed significantly lower total NPSI scores from study day 1 to 6 (P < 0.05 compared to those of NS group). However, 5 each subtotal NPSI median scores did not show any statistical difference in both groups, respectively. All data are expressed SD ± error. NFP: nefopam, NS: normal saline, BSSP: burning (superficial) spontaneous pain, PDSP: pressing (deep) spontaneous pain, EP: evoked pain, PDSP: paresthesia/dysesthesia, PN/T: pIns and needles/tingling.