From TheHill.com:
Slow-walking reimportation drug measure
Senate Majority Leader Bill Frist (R-Tenn.) blocked Democrats from attaching legislation on drug reimportation to a class-action reform bill, which he yanked off the Senate floor last week for the third time this year.

Drug reimportation legislation apparently has the numbers to pass the Senate and it already has passed the House, which has led some lawmakers, aides and lobbyists to question why the Senate has not acted.