Ordering Recommendation

Use to optimize dosing and monitor patient adherence.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Timing of specimen collection: Predose (trough) draw at steady-state concentration.

Collect

Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2EDTA).

Specimen Preparation

Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP standard transport tube. (Min: 0.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).

Remarks
Stability

After separation from cells: Ambient: 5 days; Refrigerated: 5 days; Frozen: 6 months

Methodology

Quantitative Liquid Chromatography-Tandem Mass Spectrometry

Performed

Mon, Wed, Fri

Reported

1-7 days

Reference Interval

Therapeutic Range:
70-240 ng/mL
Toxic: > 400 ng/mL

Interpretive Data

Toxic concentrations may cause hypotension, cardiac abnormalities, seizures, and coma.

Compliance Category

Laboratory Developed Test (LDT)

Note

Hotline History

N/A

CPT Codes

80335 (Alt code: G0480)

Components

Component Test Code* Component Chart Name LOINC
0090106 Protriptyline, SP 3999-0
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • protriptyline blood level
  • Triptil
  • Vivactil
  • vivactil blood level
Protriptyline, Serum or Plasma