From USA Today:
Risks are too high by William Hubbard -- associate commissioner of the U.S. Food and Drug Administration
At the U.S. Food and Drug Administration (FDA), our primary job is to ensure the safety of medicines sold in the U.S. We are on the front line in policing the drug supply to prevent bad medicine from reaching patients.

Unfortunately, unapproved drugs are illegally arriving in the United States at an unprecedented rate, as people are turning to alternative sources and transforming the traffic in drug imports from one that was composed almost entirely of commercial bulk shipments to one that includes millions of personal packages of unapproved drugs.

(Editor's note: Usually we do not include opinion pieces or editorials here, but since this was written by the best-known person against international pharmacy at the FDA, we thought it was notable enough to include.)