NASHVILLE, Tenn. & WOONSOCKET, R.I.--(BUSINESS WIRE)--Caremark Rx, Inc. (NYSE: CMX) and CVS Corporation (NYSE: CVS) announced today that the Registration Statement on Form S-4 relating to the companies’ proposed merger of equals was declared effective by the Securities and Exchange Commission. Accordingly, Caremark and CVS will immediately commence the mailing of a definitive joint proxy statement to Caremark shareholders of record as of the close of business on January 15, 2007 and to CVS shareholders of record as of the close of business on January 19, 2007.
