Treatment or prevention agent for biliary tract diseases

摘要

An object of the present invention is to provide a novel drug that has an excellent therapeutic effect on biliary tract diseases and is useful for the treatment or prevention of biliary tract diseases. Specifically, the present invention provides a therapeutic or preventive agent for biliary tract diseases comprising a compound having a specific morphinan skeleton represented by Compound 1 or a pharmacologically acceptable acid addition salt thereof as an active ingredient. It is. [Chemical 1]