Post-operative pain is the greatest fear of women who undergo Cesarean section, and despite current analgesic regimens, this pain can be severe, impeding the mother's recovery and her ability to bond with and breastfeed her new infant. Opioids are the mainstay of treatment currently, and, although effective, these drugs have significant adverse effects, including sedation, nausea, vomiting and constipation. Non-steroidal anti-inflammatory drugs (NSAIDs) can reduce opioid consumption, but also have side effects, and are contra-indicated in a significant number of patients. Therefore there remains considerable scope to improve post-Cesarean analgesia.