Efficacy and Safety of 5 µg and 10 µg Dexmedetomidine With Hyperbaric Levobupivacaine in Lower-Limb Surgeries Under Spinal Anesthesia: A Randomized Controlled Study

Both doses enhanced SA characteristics. The 10 µg dose produced faster onset and longer duration of block but with a higher incidence of manageable hemodynamic effects. Selection of dose should balance the need for prolonged anesthesia with safety considerations.