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HelpTest Code LAB807 Nortriptyline, Serum
Useful For
Monitoring nortriptyline concentration during therapy
Evaluating potential nortriptyline toxicity
May aid in evaluating patient compliance
Reporting Name
Nortriptyline, SSpecimen Type
Serum RedSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube: Red top (Serum gel/SST are not acceptable)
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Collect specimen immediately before next scheduled dose (minimum 12 hours after last dose).
2. Centrifuge and aliquot serum into a plastic vial. Serum must be separated from cells within 2 hours of collection.
Specimen Minimum Volume
0.25 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum Red | Refrigerated (preferred) | 28 days | |
| Frozen | 28 days | ||
| Ambient | 7 days |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
Reference Values
Therapeutic concentration: 70-170 ng/mL
Note: Therapeutic ranges are for specimens collected at trough (ie, immediately before next scheduled dose). Levels may be elevated in non-trough specimens.
Day(s) Performed
Tuesday, Thursday, Sunday
Report Available
3 to 5 daysSpecimen Retention Time
14 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
80299
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| NOTRP | Nortriptyline, S | 3872-9 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 37119 | Nortriptyline, S | 3872-9 |
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.