Objective To research the demographic distribution

subtypes and concurrent disease characteristics of hospitalized patients with acute pancreatitis（ AP） and analyze the drug rules. Methods The information of hospitalized patients with pancreatitis including three subtypes such as AP

acute biliary pancreatitis and pancreatitis was collected in the hospital information system（ HIS） of 19 top-level hospitals nationwide. The demographic characteristics

discharged situation

hospitalization

complications and medication information were analyzed by frequency statistics. Results There were 2 994 cases of male

2 048 cases of female and 391 cases of missing records in 5 433 cases of AP. The ages of most patients（ 1 789 cases） were from 18 to 65 years old. There were 173 patients with records of TCM syndromes. The common syndrome was liver-gallbladder damp-heat syndrome. A total of 2 038 AP patients were cured and 1 396 patients were improved. A total of 221 acute biliary pancreatitis patients were cured and56 patients were improved. A total of 150 pancreatitis patients were cured and 139 patients were improved. The common complications were gallstones

biliary tract infections

digestive cancer

hypertension and fatty liver. There were338 kinds of western medicine and 224 kinds of Chinese medicine used. The commonly used western medicine was somatostatin（ used in 3 526 cases） and the commonly used Chinese medicine was compound glycyrrhizin（ used in 1 187cases）. The common hospitalization duration was 8 to 14 days（ in 1 888 cases）. The common hospitalization cost was more than 10 000 yuan and equal to or less than 20 000 yuan（ in 1 315 cases）. Conclusion Most AP patients are young males and commonly complicated by gallstones or biliary tract infections. The common TCM syndrome is livergallbladder damp-heat syndrome. The average hospitalization duration is 8 to 28 days. The common hospitalization cost is 5 000 to 100 000 yuan. The common treatment of AP is integrative medicine.