A look at Caremark Rx Inc. and CVS Corp.

Facts about pharmacy benefits manager Caremark Rx Inc. and drugstore operator CVS Corp.

_ Caremark buys drugs from pharmaceutical companies directly and then distributes them through its national network of about 60,000 pharmacies and seven mail-order offices.

_ The company also offers administrative, benefits planning and claims processing services and manages drug therapy, physician support and education services.

_ Caremark provides services for over 2,000 corporate, insurance, managed care, government, and union health plans. Caremark has more than 13,000 employees

_ CVS is the nation's largest retail pharmacy chain, operating the most stores throughout the country.

_ CVS operates more than 6,200 stores in 43 states, offers managed-care drug programs through its PharmaCare unit and employs about 148,000 workers.

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Sources: CVS, Caremark