Nortriptyline (Aventyl) (NRTL)

Message

Collect specimen >12 hours after last dose.

Test Code

LAB807

Quest Code

272

Alias/See Also

NRTL

CPT Codes
80299

Preferred Specimen

3 mL serum collected in a red-top tube (no gel)

Patient Preparation
Collect at steady-state trough concentration. Specimen should be collected >12 hours after dose.

Minimum Volume

1.5 mL

Other Acceptable Specimens

Plasma collected in: EDTA (lavender-top) tube, sodium heparin (green-top) tube, or lithium heparin (green-top) tube

Instructions

Do not use gel barrier tubes. Separate from cells as soon as possible after clotting.

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 5 days
Refrigerated: 7 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Gel barrier/Serum separator tube (SST)

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 FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Monday-friday

Report Available

4 days

Reference Range

50-150 mcg/L

Clinical Significance

Nortriptyline is a tricyclic antidepressant. Therapeutic drug levels are monitored to assist the physician assessing therapeutic response and to avoid toxicity.

Performing Laboratory

Quest Diagnostics Nichols Institute-Chantilly VA

14225 Newbrook Drive

Chantilly , VA 20151-2228

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.