Doxepin; Desmethyldoxepin; Doxepin + Desmethyldoxepin
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Doxepin and Metabolite, Serum/Plasma
Test ID: DOX
Test
Method
LC-MS/MS
Report Includes
Specimens
Avoid gel separator tubes; Serum; Plasma (EDTA)
Test Location
St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8
Test Version
14-Oct-2022
Specimen
Specimens
Avoid gel separator tubes; Serum; Plasma (EDTA)
Sample Volume
3 mL
Specimen Comment
Avoid gel separator tubes.
Collection & Handling
Collection Instructions
Collect trough specimen (i.e. collected within 1 hours prior to next dose or at least 12 hours after last dose.)
Handling Information
Separate as soon as possible.
Stability
| Ambient | 5 days |
|---|---|
| Refrigerated | 2 weeks |
| Frozen | 6 months |
Rejection Criteria
| Specimen | Gel-separator tube |
|---|
Test Version
14-Oct-2022
Performance / Interpretation
Method
LC-MS/MS
Turnaround Time
5 days
Results
| Name | Units | Reference Range | Conversion Factor | |
|---|---|---|---|---|
| Doxepin | ng/mL |
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| Desmethyldoxepin | ng/mL |
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| Doxepin + Desmethyldoxepin, Total | ng/mL |
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(Effective 18-Oct-2022)
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Test Location
St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8
Test Version
14-Oct-2022
Interface / Setup
HL7 Interface Codes
| Order Code | Result Codes | Units |
|---|---|---|
| DOX | 7573Doxepin | ng/mL |
| 7574Desmethyl Doxepin | ng/mL | |
| 7575Combined Metabolite | ng/mL |
Test Version
14-Oct-2022