At the urging of the U.S. government, Canada is attempting to crack down on companies and doctors within its borders who help Americans get cheaper prescription drugs.
But it won't be easy.
U.S. and Canadian health officials have met several times in recent weeks, trying to coordinate an attack on the booming Internet pharmacy trade.
The FDA says it cannot guarantee the safety of imported products -- and is especially concerned about Internet sales.
Critics charge the agency and the Bush administration have been swayed by the politically powerful U.S. drug makers.
Often, U.S. patients send a prescription written by an American doctor to a Canadian Internet company, which has it reviewed and co-signed by a Canadian physician, then filled by a licensed Canadian pharmacy. The FDA has no jurisdiction in Canada. And because Canadian provincial laws vary, Internet companies say they're operating within the law
More than one-million Americans reportedly order drugs from Canada each year.