Abstract
Patient-controlled epidural analgesia (PCEA) is a strong strategy for postoperative pain control in the clinical practice. However, adverse or side effects of PCEA which are relatively frequent sometimes leave patients dissatisfied. Those side effects include nausea/vomiting, itchiness, drowsiness, respiratory depression, hypotension, etc. We should pay attention to treat those side effects, which could be important in the safety and quality of postoperative pain management.