Preferred test to follow-up presumptive results. For general screening, Propoxyphene, Urine Screen with Reflex to Quantitation (2012269) is preferred.
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Transfer 1 mL with no additives or preservatives urine to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Ambient: 1 week; Refrigerated: 1 month; Frozen: 3 years (Avoid repeated freeze/thaw cycles)
Effective August 17, 2015
|Drugs Covered||Cutoff Concentrations|
|Norpropoxyphene (qualitative only)||10 ng/mL|
Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Positive cutoff: 10 ng/mL.
For medical purposes only; not valid for forensic use.
The absence of expected drug(s) and/or drug metabolite(s) may indicate non-compliance, inappropriate timing of specimen collection relative to drug administration, poor drug absorption, diluted/adulterated urine, or limitations of testing. The concentration value must be greater than or equal to the cutoff to be reported as positive. Norpropoxyphene is reported as qualitative only. Interpretive questions should be directed to the laboratory.
Laboratory Developed Test (LDT)
80367 (Alt code: G0480)
|Component Test Code*||Component Chart Name||LOINC|
|2010470||Propoxyphene, Urn, Quant||3545-1|
|2010471||Norpropoxyphene, Urn, Qual||19635-2|