A Comparison of the Post-C/S Analgesic Effects of Neuraxial Duramorph vs Bilateral TAP Block With Liposomal Bupivacaine

Inclusion Criteria: * Females, aged 18-45 years inclusive and ASA physical status 1-3. * Undergoing non-urgent Cesarean section with neuraxial anesthesia/analgesia. * Subjects must be physically and mentally able to participate in the study and complete all study assessments. * Subjects must be able to give fully informed consent to participate in this study after demonstrating a good understanding of the risks and benefits of the proposed components of the TAP infiltration. Exclusion Criteria: History of hypersensitivity or idiosyncratic reactions to amide-type local anesthetics * Any subject whose anatomy, or surgical procedure, in the opinion of the Investigator, might preclude the potential successful performance of a bilateral TAP infiltration. * Any subject who in the opinion of the Investigator, might be harmed or be a poor candidate for participation in the study. * Any subject, who in the opinion of the Investigator, is on chronic pain medicine, including large doses of NSAIDs. * Subjects who have received any investigational drug within 30 days prior to study drug administration, or planned administration of another investigational product or procedure during their participation in this study.