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Beaumont Laboratory


Seroquel, ARUP #2003118, EPIC: LAB6326, SOFT: XQUET

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.
Also acceptable: One Lavender-top EDTA tube.

Do not use Serum Separator Tubes.
Time of Collection:
 Trough, just prior to the next dose.

Physician Office/Drawsite Specimen Preparation

Centrifuge to separate serum or plasma from cells within two hours of collection. Transfer serum or plasma to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 1.0 mL serum or plasma, refrigerated (2-8°C or 36-46°F). (Min: 0.5 mL)

Rejection Criteria

  • Serum Separator (SST) tubes.
  • Specimens not collected and processed as indicated.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 days
Refrigerated (2-8°C or 36-46°F): 1 month
Frozen (-20°C/-4°F or below): 1 month

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Sendout Laboratory with any questions.


Sent to ARUP Laboratories, Salt Lake City, UT.


Tuesday, Friday.
Results available within 2-6 days.

Reference Range

By report.

Test Methodology

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


Quetiapine (Seroquel®) is rapidly absorbed following oral administration, with peak plasma concentrations obtained in 1 to 1.5 hours post dose.

Clinical Utility

This assay aids in the therapuetic drug monitoring of quetiapine. Quetiapine (Seroquel®) is a new, FDA-approved agent for management of the manifestations of psychotic disorders, including schizophrenia. A structural analogue of Clozapine, Quintapine addresses the signs and symptoms of schizophrenia, but has fewer side efects.


  1. Gunasekara, N.S. and Spencer, C.M., Quetiapine- A Review of its Use in Schizophrenia, CNS Drugs, 9(4): 325-340, 1998.

CPT Code

80342 (alternate code: G0480).

Test Codes

ARUP #2003118, EPIC: LAB6326, SOFT: XQUET

Last Updated


Microtainer® and Vacutainer® are registered trademarks of Becton, Dickinson and Company.
UroVysion® is a registered trademark of Abbott Laboratories. ThinPrep® is a registered trademark of Hologic, Incorporated.

This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.