NASHVILLE, Tenn.--(BUSINESS WIRE)--Caremark Rx, Inc. (NYSE: CMX) today sent a letter to the Company’s shareholders detailing the compelling strategic and financial benefits of its pending merger with CVS Corporation (NYSE: CVS). Caremark reiterated its belief that the merger with CVS will deliver immediate and concrete value to shareholders and has a high certainty of completion in approximately one month. The Company believes the transaction is the most effective way to address the rapidly changing dynamics of the pharmaceutical services industry and urged shareholders to vote FOR the CVS/Caremark merger at the Caremark Special Meeting on February 20, 2007.