Ma HH, et al. - Via this meta-analysis, researchers examined the safety of periarticular injection (PAI: a regional analgesia method) and ascertained if PAI provides better pain relief and reduce the consumption of opioids after total hip arthroplasty (THA). Searching PubMed, Web of Science, Embase and the Cochrane Library, they included 11 randomized control trials that compared the efficacy of PAI with the control group. Outcomes of this analysis revealed better pain relief and less amount of opioid consumption after THA in correlation to the administration of PAI compared to the control group. PAI was identified to be a safe and effective multimodal analgesia technique that can be used for THA in this meta-analysis.