Doxepin and Metabolite : ARUP Lab Tests

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Doxepin and Metabolite : 0090102

Mnemonic: DOXEPIN

Methodology:	Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed:	Sun-Sat
Reported:	1-3 days
Specimen Required:	Collect: Plain red. Also acceptable: Lavender (K₂ or K₃EDTA) or pink (K₂EDTA). Specimen Preparation: Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution). Stability (collection to initiation of testing): After separation from cells: Ambient: 5 days; Refrigerated: 2 weeks; Frozen: 6 months

Reference Interval: Therapeutic Range: Doxepin & nordoxepin: 100-300 ng/mL Toxic: > 400 ng/mL
CPT Code(s):	80166 Doxepin; 80299 Nordoxepin
Cross References:	Adapin (Doxepin & Metabolite), Nordoxepin (Doxepin & Metabolite), Prudoxin (Doxepin & Metabolite), Sinequan (Doxepin & Metabolite), Zonalon (Doxepin & Metabolite)

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