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methadone metabolite EDDP in the urine

Name methadone metabolite EDDP in the urine
Specimen requirements 10 ml of urine
Collection instructions If possible, take first morning urine under supervision.
Procedure remarks Refrigerate before sending in; freeze for prolonged storage; no additives.
Detection time: up to 3 days
Clinical utility methadone substitution
Methodology EIA (enzyme immunoassay),
GC-MS (gas chromatography mass spectrometry) for confirmation
Reference ranges Cut-off: 100 ng/ml
Notes and interpretation The assay only provides a preliminary analytical test result. In particular, preliminary positive findings should be confirmed using a more specific method (e.g. GC-MS).
Diagnostic recommendation The detection of EDDP makes the manipulation of the urine with methadone ineffectual.