Wolf Haldenstein Announces Investigation into Sepracor, Inc. Proposed Acquisition

Attorney Advertising. The law firm of Wolf Haldenstein Adler Freeman & Herz LLP is investigating possible breaches of fiduciary duty by the Board of Directors of Sepracor, Inc. ("Sepracor”) [NYSE:SEPR] arising out of the proposed acquisition of Sepracor by Dainippon Sumitomo Pharma Co. ("Dainippon”).

On September 3, 2009, Dainippon announced that it would acquire Sepracor at $23 per share, for a total of approximately $2.6 billion. Additionally, the Board agreed to provisions including a no-solicitation provision and a termination fee of $77.4 million. Pursuant to this proposed transaction, Dainippon may be underpaying for Sepracor, thus unlawfully harming Sepracor shareholders.

Wolf Haldenstein has been representing individual and institutional investors for many years, serving as lead counsel in numerous cases in U.S. federal and state courts. Please visit the Wolf Haldenstein website (http://www.whafh.com) for more information about the firm.

If you own Sepracor common stock and you wish to discuss this matter with us, or have any questions concerning your rights and interests with regard to this matter, please contact:

Attorney Advertising. Prior Results Do Not Guarantee A Similar Outcome.