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Aims Proctological procedures such as haemorrhoidectomy have been reported with significant post-operative pain affecting quality of life as well as capacity to perform daily activities. The objective of this article is to explore the role of conventionally used antibiotic metronidazole as a proctological analgesic. Methods A systematic review of the randomized, controlled trials reporting the use of oral metronidazole as post-operative proctological analgesic agent in patients undergoing haemorrhoidectomy published on Embase, Medline, PubMed, PubMed Central and Cochrane databases was performed using the principles of meta-analysis. Results A total of eight randomized, controlled trials on 447 patients were included in this study. In the random effects model analysis using the statistical software Review Manager, the use of oral metronidazole as a post-operative proctological analgesic agent was significantly associated with the reduced pain score on day 1 (Standardized mean difference (SMD), -0.56; 95% CI, -1.04, -0.07; z = 2.26; P = 0.02), day 3 (SMD, -0.82; 95% CI, -1.33, -0.31; z = 3.15; P = 0.002) and day 7 (SMD, -1.48; 95% CI, -2.51, -0.45; z = 2.82; P = 0.005). There was significant heterogeneity (Tau2 = 0.39, chi2 = 38.38, df = 7, [p = 0.00001]; I2 = 82 %) among included studies. Conclusion The use of oral metronidazole as a post-operative proctological analgesic agent following haemorrhoidectomy seems to have proven clinical advantages and may routinely be used.

british journal of surgery

SP7.1.3 An integrated and upgraded meta-analysis of published randomized, controlled trials exploring the role of oral metronidazole as post-operative proctological analgesic agent