https://www.selleckchem.com/products/Bortezomib.html and effective alternative in the management of pain in this group of patients. KEY WORDS Pelvic pain, neoplasms, chemical neurolysis, pain management, cancer pain, palliative care, analgesia, nerve block.BACKGROUND Meperidine, a synthetic opioid, has a rapid onset and short duration of action. Mounting evidence has challenged meperidine's analgesic benefits, and concerns have been raised about its safety profile. Despite recommendations to restrict the prescription of meperidine, the drug remains frequently used. OBJECTIVES The aim of this study was to evaluate the evidence regarding the efficacy and safety of meperidine for acute postoperative and labor pain. STUDY DESIGN This was a narrative review of the analgesic efficacy and side effects of meperidine compared to other analgesic drugs for acute postoperative and labor pain in adults. SETTING Randomized controlled trials that compared the analgesic efficacy and side effect profile of meperidine versus another analgesic drug in adult patients were evaluated. METHODS A systemized search of randomized controlled trials studying meperidine for acute postoperative or labor pain in the adult patient population from PubMed, Medline, and EMBASE was performed. Inc uncommon side effects, such as central nervous system toxicity. In addition, some of the included clinical studies were old. CONCLUSION Considering the availability of other effective analgesics with potentially fewer side effects, the use of meperidine for acute postoperative or labor pain should not be recommended. KEY WORDS Acute postoperative pain, adverse effects, labor analgesia, meperidine, pethidine.BACKGROUND Conventional open surgical procedures may cause massive dissections of the spine, higher perioperative complications, prolonged hospitalization, protracted rehabilitation programs and recovery. Percutaneous endoscopic lumbar interbody fusion (PELIF) is an evolving treatment option. OBJECTIVES To