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VAS: visual analog scale
| VAS | Methocarbamol group (no. 55) | Nefopam group (no. 55) | P-value |
| At 1 hour (Mean ± SD) | 3.58±0.629 | 5.31±1.06 | <0.001 |
| After 6 hours (Mean ± SD) | 4.82±1.27 | 5.53±0.92 | <0.001 |
| After 12 hours (Mean ± SD) | 3.07±0.92 | 4.71±1.18 | <0.001 |
