Simple, Rapid Spectrophotometric Assay of Dispensed Methadone for Diversion Control.

A handheld, low-cost ultraviolet light spectrometer detected altered take-home doses of methadone. This assay presents a simple and effective method for methadone clinics to perform inhouse analysis on "call back" methadone doses. It allows individual clinics to define diversion rates of their patient body, while allowing state and federal agencies to better understand how much prescribed methadone is diverted for illicit uses.