Comparison of Postoperative Analgesic Duration of Intrathecal Dexmedetomidine Versus Buprenorphine as Adjuvant to 0.5% Heavy Bupivacaine in Spinal Anesthesia for Orthopedic Surgeries. Med J South Punjab. 2023;4(2):70-76. doi:10.61581/MJSP.VOL04/02/10