There were statistically significant differences between the pregabalin plus celecoxib and placebo groups in average intravenous morphine consumption per 4-hour interval ( 6.0 5.9 vs 9.3 7.9 mg ; P < .05 ) , mean daily narcotic pill consumption ( 2.9 2.9 vs 6.8 1.8 pills ; P < .05 ) , and mean daily visual analog scale scores ( 4.3 3.5 vs 5.5 5.0 ; P < .05 ) .