IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-11-4-41706 Original Research Paper A Comparison of Intraperitoneal Instillation of Bupivacaine - Tramadol with Bupivacaine - Magnesium Sulphate for Pain Relief after Laparoscopic Cholecystectomy Ambuj Dr. Dr. Basant Narain Singh Dr. April 2022 11 4 01 02