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Item Value
Approval req'd? No
Available Stat? No
Test code NRT
Performed by Quest
Sendout? Yes
Method Liquid Chromatography Tandem Mass Spectrometry
Container type Red top (Gold top NOT acceptable)
Amount to Collect 8 mL blood
Sample type Serum
Preferred volume 4 mL serum
Min. Volume 1.5 mL serum
UCSF Rejection Criteria Sample collected in Gold top
Processing notes If both Nortriptyline and Amitriptyline (Elavil) are requested, order Amitriptyline (AMTR) only.

Separate serum promptly. Refrigerate. Order Quest # 272
Units µg/L (mcg/L)
Normal range
Therapeutic 50-150 µg/L
Potentially toxic > 500 µg/L
Critical value Quest Priority-1: ≥ 500 µg/L
Synonyms Aventyl
Turn around times Test performed Monday-Saturday. Turnaround time: 2-5 days.
CPT coding 80335-90
LOINC code 3872-9
Last Updated 6/21/2016 12:15:25
Entry Number 687
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