 Pain after Caesarean section involves 2 components, somatic pain from the wound and visceral pain from uterine contractions2. Different mechanisms underlie somatic and visceral pain transmission, at spinal and supraspinal levels, supporting different sensitivity to analgetics2. Pain at rest is usually well controlled by parenteral opioids, while pain induced by movements is less responsive to opioids, requesting higher doses with an increase of side effects3. 