Thioridazine and Metabolite, Serum/Plasma

Test Code

0990

Quest Code

23232

Alias/See Also

Quest 23232; Sunquest: THZ

CPT Codes
80299

Includes

Thioridazine and Mesoridazine

Preferred Specimen

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

Minimum Volume

0.7 mL

Other Acceptable Specimens

Plasma collected in: EDTA (lavender-top) tube or EDTA (pink-top) tube

Instructions

Promptly centrifuge and separate serum or plasma into a transport tube

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 8 days
Refrigerated: 8 days
Frozen: 1 year

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

Polymer gel separation tube (SST or PST)

Methodology
Gas Chromatography (GC)

FDA Status
This test was developed and its performance characteristics determined by NMS Labs. It has not been cleared or approved by the US Food and Drug Administration.

Setup Schedule

As needed

Report Available

4-6 days

Clinical Significance

Thioridazine is a phenothiazine for treating psychosis. Monitoring its level is important to optimize therapy, to avoid toxicity, and to assure compliance.

See Drug Half-life, Steady State, and Recommended Sample Collection Time in the Toxicology section of Test Application and Interpretation.

Performing Laboratory

NMS Labs

200 Welsh Road

Horsham, PA 19044

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.