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If you have additional questions regarding this test, please call: 415-353-1667
Methadone screen, urine
|Test Update Information||Effective June 22, 2016, methadone screening will be carried out in-house at Parnassus Chemistry. The cut-off for a positive result will remain 300 µg/L. There will be no change in the % of positive results within our patient population.|
|Performed by||Parnassus Chemistry|
|In House Availability||Test available 24 hours per day, 7 days a week.|
|Method||Homogenous enzyme immunoassay (Beckman DxC 800) using G6PDH- labeling
|Container type||Urine cup|
|Amount to Collect||See preferred volume|
|Sample type||Random urine|
|Preferred volume||1 mL urine|
|Min. Volume||0.5 mL urine|
|Processing notes||Refrigerate sample.
If methadone confirmation is requested, order Sunquest test code MEDCON (Quest test code 16918). Sample should be transported at room temperature.
Note: a negative result indicates that methadone is not present, or it is present at a concentration below the cut-off concentration of 300 µg/L.
|Stability||Refrigerated for 7 days, frozen at -20C 1 month.|
|Additional information||A concentration of <300 µg/L is considered negative by this test. A positive result is ≥ 300 µg/L and indicates the presence of methadone. This immunoassay is only a screening test and is not definitive. It is only designed to detect the parent drug, methadone, and NOT the major methadone metabolites (EDDP, EMDP).
Results cannot be used for medico-legal purposes.
Positive results will NOT be automatically confirmed. If a confirmation is required, call the laboratory at 415 353 1667 within 7 days of sample collection to request to add-on a methadone confirmation (detects methadone and EDDP, the major metabolite; test code MEDCON).
|Last Updated||6/21/2016 6:32:27 PM|