This excerpt taken from the CVS 10-K filed Feb 27, 2008.
Efforts to reform the U.S. healthcare system may adversely affect our financial performance
Congress periodically considers proposals to reform the U.S. healthcare system. These proposals may increase government involvement in healthcare and regulation of PBM or pharmacy services, or otherwise change the way the combined company or its clients do business. Health plan sponsors may react to these proposals and the uncertainty surrounding them by reducing or delaying purchases of cost control mechanisms and related services that the combined company would provide. The Company cannot predict what effect, if any, these proposals may have on its retail and pharmacy services businesses. Other legislative or market-driven changes in the healthcare system that the Company cannot anticipate could also materially adversely affect the combined companys consolidated results of operations, consolidated financial position and/or consolidated cash flow from operations.