“Fentanyl and Dexmedetomidine With Bupivacaine in Spinal Block for Post Operative Analgesia in Lower Limb Orthopaedic Surgery : A Comparative Study”. Asian Journal of Pharmaceutical and Health Sciences 6, no. 2 (June 30, 2016): 1453–1460. Accessed February 27, 2026. https://www.ajphs.com/index.php/ajphs/article/view/375.