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, [S. l.], v. 6, n. 2, p. 1453–1460, 2016. Disponível em: https://www.ajphs.com/index.php/ajphs/article/view/375. Acesso em: 27 feb. 2026.