Buscopan exerts a spasmolytic action on the smooth muscle of the gastrointestinal, biliary and urinary tracts. As a quaternary ammonium derivative, hyoscine-N- butylbromide does not enter the central nervous system. Therefore, anticholinergic side effects at the central nervous system do not occur. Hyoscine butylbromide, also known as scopolamine butylbromide and sold under the brandname Buscopan among others, is a medication used to treat crampy abdominal pain, esophageal spasms, renal colic, and bladder spasms. It is also used to improve respiratory secretions at the end of cuttheropegame.netncy category: AU: B2. Human Resources for the University of Oklahoma. Serving Faculty and Staff in Norman, Oklahoma City, and Tulsa campuses.