Effects of different doses of fentanyl combined with bupivacaine in spinal anesthesia elective cesarean section: a randomized clinical trial in the Palestinian obstetrics practice

The women who received 25 mcg of fentanyl with 7.5 mg of hyperbaric bupivacaine had significantly shorter sensory block latency, longer duration of sensory block, longer duration of analgesia, less need for rescue analgesia, expressed higher satisfaction with analgesia, experienced less hemodynamic instabilities, and experienced fewer episodes of bradycardia and vomiting compared to those who received bupivacaine alone or in combination with lower doses of fentanyl.