NY -- Standard&Poor's CreditWire 5/30/97 -- Standard&Poor's today has raised its senior unsecured rating on Revco D.S. Inc.and on Hook-SupeRx Inc., its wholly owned subsidiary, to single-'A'-minus from triple-'B'-minus following the close of the Revco acquisition by CVS Corp. These ratings have been removed from CreditWatch where they were placed February 7, 1997. Standard&Poor's also has affirmed its single-'A'-minus senior unsecured rating and its 'A-2' commercial paper rating on CVS. In addition, Standard&Poor's has assigned its single-'A'-minus rating to the company's revolving credit facilities. The corporate credit rating is also single-'A'-minus. The outlook is negative. Revco and Hook-SupeRx's ratings have been raised based on CVS's credit profile and its intention to refinance