This randomized phase II trial studies how well simvastatin works in reducing pancreatitis (the inflammation of the pancreas) in patients with pancreatitis that occurs more than once (recurrent), has worsened quickly (acute), or has persisted or progressed over a long period of time (chronic). Simvastatin may decrease the inflammation of the pancreas by modulating the immune response responsible for inflammation. It is not yet known if simvastatin may be an effective treatment for pancreatitis.