Pancreatitis is one of the major complications of ERCP. It has been shown that NSAIDs are potent inhibitors of phospholipase A2, activity which is increased in pancreatitis. The only one study with IM diclofenac showed reduction of post-ERCP pancreatitis without SOD (sphincter of Oddi dysfunction) by subgroup analysis in small study population. Therefore the investigators must need large scaled randomized control study including of SOD.