U.S. Customs
http://www.customs.ustreas.gov/travel/travel.htm :
"A new bill was recently passed by Congress that amends a portion of the Controlled Substances Act (21USC956(a)). This amendment allows a United States resident to import up to 50 dosage units of a controlled medication without a valid prescription at an international land border. These medications must be declared upon arrival, be for your own personal use and in their original container."
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Just a thought for those of you who did not know.
Peace
XiZBiT