Okonkwo UN, Ewah RL, Ebirim LN. A comparison of ketamine with pentazocine for analgesia in propofol based total intravenous anaesthesia for short surgical procedures. Int J Res Med Sci [Internet]. 2022 May 27 [cited 2025 Oct. 14];10(6):1211-8. Available from: https://www.msjonline.org/index.php/ijrms/article/view/10725