It was wonder drug for me but I'm over 55.
Zelnorm is back but limited.
See link:
http://www.webmd.com/ibs/news/20070727/ibs-drug-zelnorm-okd-for-some
My doc told me it was only taken off because 11 people out of thousands had experienced cardiac problems and wanted to blame it on zelnorm but they were elderly and ALREADY had cardiac problems.