From AARP:
Battle Lines Drawn on Rx Imports
Sensitive to a popular cause that has gained enormous momentum over the past six months, Congress is now closer to making it legal and safer for Americans to buy lower-cost prescription drugs from abroad—though what form that action will take is far from certain.

Previous attempts to legalize drug importation, including one signed into law in 2000, have all foundered on the "safety issue"—the fear that it would open the floodgates to counterfeit and otherwise harmful medications. President Bush, the pharmaceutical industry and the Food and Drug Administration (FDA), the agency responsible for drug safety, all cite safety in opposing legalization.