| Summary: | Abstract Background Many selective cyclooxygenase (COX-2) inhibitors are currently used in clinical practice. COX-2 inhibitors have good anti-inflammatory, analgesic, antipyretic effects, and gastrointestinal safety. However, the analgesic effects and adverse reactions of COX-2 after total knee/hip arthroplasty (TKA/THA) are not fully known. Objective To evaluate the efficacy and safety of selective COX-2 inhibitors in postoperative pain management in patients receiving TKA/THA. Methods Randomized controlled trials (RCTs) were retrieved from medical literature databases. Risk ratios (RR) Std mean difference (SMD) and 95% confidence intervals (CI) were calculated to analyze the primary and safety endpoints. Results In total, 18 articles (23 trial comparisons) were retrieved comprising 3104 patients. Among them, 1910 patients (61.5%) were randomized to the experimental group whereas 1194 patients (38.5%) were randomized to the control group. The primary endpoints were the patients’ VAS score at rest or on ambulation (within 3 days). We found that VAS score in patients that received selective COX-2 inhibitor was significantly lower compared to those of the control group. Conclusion This meta-analysis shows that selective COX-2 inhibitor therapy is effective, safe, and reliable in relieving postoperative pain of THA/TKA.
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