Sign in →

Test ID BLOD0385 Doxepin and Nordoxepin, Serum

Useful For

Monitoring therapy

 

Evaluating potential toxicity

 

Evaluating patient compliance

Specimen Type

Serum Red


Specimen Required


Container/Tube: Red top

Specimen Volume: 1 mL

Collection Instructions:

1. Draw specimen immediately before next scheduled dose (or at a minimum 12 hours after last dose).

2. Serum must be separated from cells within 2 hours of draw.


Specimen Minimum Volume

0.25 mL

Reject Due To

Hemolysis

Mild OK; Gross reject

Lipemia

Mild OK; Gross reject

Icterus

Mild OK; Gross reject

Other

Serum gel tube

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  7 days

Day(s) and Time(s) Performed

Monday through Friday; Varies

Analytic Time

2 days

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

80335

G0480 (if appropriate)

Reporting Name

Doxepin and Nordoxepin, S

Reference Values

Therapeutic concentration (doxepin + nordoxepin): 50-150 ng/mL

Note: Therapeutic ranges are for specimens drawn at trough (ie, immediately before next scheduled dose). Levels may be elevated in non-trough specimens.

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.
Sanford Laboratories - Fargo Additional Information:

SANFORD INTERFACE BUILD INFORMATION

Result Code Result Code Description
1359 Doxepin
17733 Nordoxepin
17734 Doxepin and Nordoxepin