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For the pain management panel only, regardless of the screen results, GC/MS confirmation for the following drugs are completed and reported individually as positive/negative with a detection limit of 100 ng/mL: morphine, codeine, oxycodone, oxymorphone, hydrocodone, hydromorphone.
In 2012, Collins et al. reported positive urine methadone screens using the DRIÂ® Methadone enzyme immunoassay (EIA) among patients taking tapentadol. We sought to determine whether therapeutic use of tapentadol is associated with false-positive urine screen for opiate or methadone by Syva EMIT IIÂ® immunoassay. We thawed the specimens before testing with the Siemens Syva EMIT IIÂ® immunoassay for methadone and opiates.