MARLBOROUGH, Mass.--(BUSINESS WIRE)--Sepracor Inc. (Sepracor) and Dainippon Sumitomo Pharma Co., Ltd. (DSP), an Osaka, Japan-based pharmaceutical company, announced today the intent to change the Sepracor name to Sunovion Pharmaceuticals Inc. in the United States. DSP acquired Sepracor in October 2009 and the name change is planned to occur in anticipation of the one-year anniversary of the acquisition. Sepracor intends to begin officially operating as Sunovion Pharmaceuticals Inc. before the end of 2010.