Darvocet-N® Darvon®
9 days
Liquid chromatography/mass spectrometry (LC/MS)
Therapeutic: 100−400 ng/mL
Accredited Laboratory Partner
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Monitor therapeutic levels of propoxyphene (Darvon®).
Serum or plasma
1 mL
Red-top tube, lavender-top (EDTA) tube or green-top (heparin) tube. Do not use a gel-barrier tube. The use of gel-barrier tubes is not recommended due to slow absorption of the drug by the gel. Depending on the specimen volume and storage time, the decrea
Collect specimen immediately prior to next dose.