The VeriLinkRxoffers a practical solution to monitor samples of narcotics returned to the hospital pharmacy. An easy to perform and fast measurement will alert staff that the returned sample does not match what was dispenses originally. Using a highly accurate refractive index measurement, pharmacy staff can be quickly alerted to possible incidences of drug diversion or tampering. Once alerted management can decide if further 3rd party testing should be pursued. The VeriLinkRx thus offers hospitals a method to monitor not only the physical vials of dispensed narcotics but the actual contents.