From the Boston Globe:
Canada drug crackdown will be difficult
Urged on by the U.S. government, Canadian officials are cracking down on companies, pharmacists and physicians within their borders that help provide American citizens with cheaper prescription drugs.

But complex jurisdictional issues guarantee the enforcement won't be that quick or that simple.

Although the U.S. Food and Drug Administration has escalated its threats to shut down companies exporting drugs to America, FDA Commissioner Mark McClellan said there are ''no automatic mechanisms set up between our countries.''