Essentially, the idea is to give each individual vial or pill bottle a unique serial number, then track the custody of each as it moves through the supply chain. When a pharmacy receives the drugs, it can look up the chain of custody of a particular medicine, in order to confirm that the item is, indeed, a legitimate product.
For more detail on the use of RFID as a anticounterfeiting tool, check out these articles:
Pfizer Prepares for Viagra E-Pedigree Trial
Six U.K. Drugmakers Pilot RFID
Manufacturers Propose Tools to Fight Counterfeiting
EPC as an Anti-counterfeiting Tool
Keeping Bogus Drugs Out of the Medicine Cabinet
Medical Company Turns to RFID for Authentication
—Mark Roberti, Editor, RFID Journal
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