Doxepin
Test Summary
Doxepin is a tricyclic antidepressant. Therapeutic drug levels are monitored to assist the physician assessing therapeutic response and to avoid toxicity.
Aliases
- N/A
Specimen Collection
Special Instructions
N/A
Preferred Specimen
3 mL serum collected in a red-top tube (no gel)
Minimum Volume
1.5 mL
Instructions
N/A
Patient Preparation
Collect at steady-state trough concentration. Specimen should be collected >12 hours after dose.
Storage
Transport tube
Transport Temperature
Room temperature
Specimen Stability
- Room temperature: 5 days
- Refrigerated: 7 days
- Frozen: 30 days
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube, sodium heparin (green-top) tube, or lithium heparin (green-top) tube
Unacceptable Specimens
Gross hemolysis • Gel barrier/serum separator tube (SST)
Order Code
DOXPIN
EPIC (Premier) Code
LAB165
Includes
Doxepin, Nordoxepin and Total
CPT Code
- 80299
Billing Code
- 670259
CPT Statement
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute Valencia
27027 Tourney Road
Valencia CA, 91355
27027 Tourney Road
Valencia CA, 91355
Department
Reference Testing
Reference Range
| Total | 110-250 mcg/L |
Setup Schedule / Expected Turnaround Time
10:00 a. m. Tuesday - Saturday; Report available: 2 - 4 days
Specimen Collection
Special Instructions
N/A
Preferred Specimen
3 mL serum collected in a red-top tube (no gel)
Minimum Volume
1.5 mL
Instructions
N/A
Patient Preparation
Collect at steady-state trough concentration. Specimen should be collected >12 hours after dose.
Storage
Transport tube
Transport Temperature
Room temperature
Specimen Stability
- Room temperature: 5 days
- Refrigerated: 7 days
- Frozen: 30 days
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube, sodium heparin (green-top) tube, or lithium heparin (green-top) tube
Unacceptable Specimens
Gross hemolysis • Gel barrier/serum separator tube (SST)
Result Information
Methodology
Chromatography/Mass Spectrometry
Testing Laboratory
N/A
Reference Range
| Total | 110-250 mcg/L |
Setup Schedule / Expected Turnaround Time
10:00 a. m. Tuesday - Saturday; Report available: 2 - 4 days