title: Meta-analysis of prophylactic allopurinol use in post-endoscopic retrograde cholangiopancreatography pancreatitis.
abstract: The aim of this study was to evaluate the effectiveness and the safety of allopurinol in the prophylaxis of post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis.
  
  
  METHODS
  : We used the method recommended by the Cochrane Collaboration to perform a meta-analysis of randomized controlled trials (RCTs) of allopurinol in the prevention of post-ERCP pancreatitis (PEP), including 6 RCTs conducted all over the world.
  
  
  RESULTS
  : Six RCTs totaling 1554 patients undergoing ERCP were included. When the RCTs were analyzed, odds ratios of allopurinol were 0.74 (95% confidence interval [CI], 0.37-1.48; P = 0.40) for PEP, 0.87 (95% CI, 0.33-2.28; P = 0.78) for severe PEP, 0.88 (95% CI, 0.37-2.11; P = 0.78) for post-ERCP hyperamylasemia, and 0.19 (95% CI, 0.01-3.91; P = 0.28) for case-fatality ratio of PEP, thus indicating no beneficial effects of allopurinol on acute pancreatitis, PEP death rate, and hyperamylasemia. No evidence of publication bias was found.
  
  
  CONCLUSIONS
  : Allopurinol cannot prevent the pancreatic injury after ERCP. Allopurinol is not recommended in the prophylaxis of PEP.
authors.affiliation: Department of Infection and Liver Diseases, The First Affiliated Hospital of Wenzhou Medical College, Wenzhou, China.
authors.forename: Minghua
authors.initials: M
authors.lastname: Zheng
authors.forename: Yongping
authors.initials: Y
authors.lastname: Chen
authors.forename: Jianling
authors.initials: J
authors.lastname: Bai
authors.forename: Yongning
authors.initials: Y
authors.lastname: Xin
authors.forename: Xiazhen
authors.initials: X
authors.lastname: Pan
authors.forename: Lu
authors.initials: L
authors.lastname: Zhao
mesh_terms: D000493:Allopurinol / Q000008:administration & dosage* / Q000009:adverse effects; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000009:adverse effects*; D019317:Evidence-Based Medicine; D006801:Humans; D010195:Pancreatitis / Q000209:etiology / Q000517:prevention & control*; D011292:Premedication; D020011:Protective Agents / Q000008:administration & dosage* / Q000009:adverse effects; D016032:Randomized Controlled Trials as Topic; D017211:Treatment Failure
chemical_list: D020011:Protective Agents; D000493:Allopurinol