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Test Code AMTNOM Amitriptyline and Nortriptyline, Serum

Additional Codes

 

MAYO Test ID

AMTRP

EPIC Test ID

LAB681

 

Useful For

Monitoring serum concentration during therapy

 

Evaluating potential toxicity

 

The test may also be useful to evaluate patient compliance

Method Name

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Reporting Name

Amitriptyline and Nortriptyline, S

Specimen Type

Serum Red


Specimen Required


Container/Tube: Red top

Specimen Volume: 1 mL

Collection Instructions:

1. Draw specimen immediately before next scheduled dose (minimum 12 hours after last dose).

2. Serum must be separated from cells within 2 hours of draw.


Specimen Minimum Volume

0.25 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  7 days

Reject Due To

Hemolysis

Mild OK; Gross reject

Lipemia

Mild OK; Gross reject

Icterus

Mild OK; Gross reject

Other

Serum gel tube

Reference Values

AMITRIPTYLINE AND NORTRIPTYLINE

Total therapeutic concentration: 80-200 ng/mL

 

NORTRIPTYLINE ONLY

Therapeutic concentration: 70-170 ng/mL

Note: Therapeutic ranges are for specimens drawn at trough (ie, immediately before next scheduled dose). Levels may be elevated in non-trough specimens.

Day(s) and Time(s) Performed

Monday through Friday; Varies

Analytic Time

2 days

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

80335

G0480 (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
AMTRP Amitriptyline and Nortriptyline, S 43106-4

 

Result ID Test Result Name Result LOINC Value
63506 Amitriptyline 3333-2
36755 Nortriptyline 3872-9
36756 Amitriptyline and Nortriptyline 3335-7