This study involves taking a drug Aprepitant by mouth 4 hours before the ERCP and once a day for two days after the ERCP, in an attempt to reduce the risk of pancreatitis caused by ERCP. Pancreatitis, or injury and inflammation of the pancreas, is the most common complication of ERCP and occurs in approximately 6 out of every 100 patients undergoing ERCP. It may result in pain and lead to hospitalization and, in some cases, a need for further procedures such as surgery.~Aprepitant is a medication that is currently used to prevent nausea and vomiting in some patients caused by chemotherapy for the treatment of cancer. It is also approved for the prevention of post-operative nausea and vomiting. There is theoretical evidence from animal studies that the way in which Aprepitant works in the body may prevent pancreatitis.
The purpose of this study is to determine if giving Aprepitant 4 hours before and for two days after ERCP decreases the risk of developing pancreatitis after ERCP.