1Department of General Practice, The First Affiliated Hospital of Xi’an Medical University, Xi’an, China 2Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China 3Pancreatic Disease Center of Xi’an Jiaotong University, Xi’an, China Objective: Ondansetron administration is a common antemetic of acute pancreatitis therapy in the intensive care unit (ICU), but its actual association with patients’ outcomes has not been confirmed.