Background and aims: Magnesium sulfate has recently gained popularity as an adjuvant to general anesthesia. It acts as a blocker of N-methyl D-aspartate (NMDA) antagonist and hence may have a potential role in the prevention of postoperative pain. The aim of the present prospective, randomized, double-blind, and placebocontrolled study was to evaluate the efficacy of injection magnesium sulfate 50 mg/kg as premedication upon postoperative pain and analgesic requirement in patients undergoing elective laparoscopic cholecystectomy under general anesthesia.
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