Patient-controlled oral analgesia for acute abdominal pain: A before-and-after intervention study on pain intensity and use of analgesics

Patient-controlled oral analgesia significantly reduced the numerical ranking pain scale score on Day 5 and the consumption of analgesics on Days 3 and 4 after hospital admission. Patient-controlled oral analgesia is feasible as pain management for patients, but only with minor impact on experienced pain intensity and use of analgesics.