Intravenous Methadone Versus Intrathecal Morphine for Analgesia Following Cesarean Delivery

"Subjects will receive standardized spinal anesthesia without intrathecal morphine (intrathecal 1.6-2 mL 0.75% bupivacaine + dextrose, 15 mcg fentanyl) and intravenous methadone (0.2mg/kg total body weight up to max dose of 20 mg, with saline added to make total volume 2 mL)~The Intravenous line (IV) methadone will be administered after cord clamping and administration of uterotonics with the dose of medication divided into 4 equal aliquots each administered 5 minutes apart."

"Subjects will receive standardized spinal anesthesia with intrathecal morphine 150 micrograms and no methadone (2cc dose of IV normal saline)~The Intravenous line (IV) saline will be administered after cord clamping and administration of uterotonics with the dose of medication divided into 4 equal aliquots each administered 5 minutes apart."