Ultrasound-Guided Infraclvicular Block Using Dexmedetomidine Versus Nalbuphine as Adjuvants to Bupivacaine in Upper Limb Orthopedic Surgery

Inclusion Criteria: Adults aged 18-65 years ASA I-II (American Society of Anesthesiologists physical status classification) Scheduled for elective upper limb orthopedic surgeries Able to provide informed consent to participate in the study Exclusion Criteria: Refusal to participate in the study Pregnancy Allergy to any study drug(s) Neurological disease (e.g., neuropathies, central nervous system disorders) Coagulopathy or active bleeding disorders Severe systemic diseases (e.g., uncontrolled cardiovascular, renal, or liver disease) Opioid abuse or history of substance use disorder