EXTON, Pa.--(BUSINESS WIRE)--Adolor Corporation (NASDAQ:ADLR) will be hosting an investor conference call and webcast on Wednesday, May 21, 2008 at 8:30 a.m. Eastern Time to discuss the U.S. Food and Drug Administration (FDA) approval of Entereg® (alvimopan) capsules to help patients regain gastrointestinal function earlier following bowel resection surgery.