Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 40 2 2002 06 15 100 103 "Ghazi Saidi K Hajipour A " 2015 09 28 In a randomized, double blind study , we compared post operative pain and analgesic requirement in patients undergoing cesarean section with two types of general anesthesia: standardized general anesthesia (control group=26 cases) and preemptive low-dose ketamine (0.2 mg/kg) administered prior to anesthesia induction (keratmine group=27 cases). Postoperative analgesia was provided for both groups using morphine intravenously based on visual analogue scale (VAS). After the operation we found that the time from the end of surgery to the first request for analgesic was longer in ketamine group (10.22±8 hrs) than in the control group (1.65±1.01 hrs0 (P https://acta.tums.ac.ir/index.php/acta/article/view/2589 https://acta.tums.ac.ir/index.php/acta/article/download/2589/2573