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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.
No false-positive urine screens for methadone or opiate occurred using the Syva EMIT IIÂ® immunoassay in urine samples from eleven patients with confirmed therapeutic use of up to 600 mg/day of tapentadol. Declaration of interest. The authors report no conflicts of interest.