IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-4-48048 Original Research Paper Assessment Of Efficacy Of Pre-Operative Transdermal Fentanyl Patch In Post -Operative Analgesia In Patients Undergoing Abdominal Surgeries Under General Anaesthesia - A Prospective Randomised Controlled Study Arun Prasath D Dr. Dr Vaishali Amutha Selvaraju Dr. Dr. Lakshmi Ramakrishnan Dr. April 2023 12 4 01 02