SANTA CLARA, Calif.--(BUSINESS WIRE)--XenoPort, Inc. (Nasdaq:XNPT) announced today that it has discovered a novel prodrug that has the potential to improve significantly the blood concentration of acamprosate compared with the currently approved formulation of acamprosate. Preclinical data on this new product candidate will be presented tomorrow at the National Fragile X Foundation’s 12th International Fragile X Conference in Detroit, Michigan.