Nortriptyline NORTP
| Method(s) | Quantitative Liquid Chromatography - Tandem Mass Spectrometry |
|---|---|
| Specimen Required | |
| Collect | One 6 mL plain red top tube. Also acceptable: Lavender (EDTA) or pink (K2EDTA) top tubes. |
| Transport | Separate serum/plasma from cells within 2 hours of collection. 1 mL serum or plasma refrigerated. (Min: 0.5 mL) |
| Stability | After separation from cells: Ambient: 5 days; Refrigerated: 2 weeks; Frozen: 6 months. |
| Unacceptable Conditions | Whole blood, gel separator tubes, light blue (citrate) or yellow (SPS or ACD solution) top tubes. |
| Schedule | Mon, Wed, Fri |
| Billing Code | 5011540 |
| CPTCode | 80335 (Alt code: G0480) |
| Notes | Do not order if amitriptyline is administered. Instead order Amitriptyline/Nortriptyline by HPLC (AMIT). |
| Preferred Specimen Collection Device(s) | |
| Reference Interval | |
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Therapeutic Range: 50-150 ng/mL Toxic: Greater than 500 ng/mL |
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