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Thioridazine-266

Test info

Test name:

Thioridazine

Test number:

266

Excellian order number:

LAB266

Abbreviation:

THI

Alternate names:

Mellaril®

Tests included:

Thioridazine
Mesoridazine

Useful for:

Therapeutic drug management

Specimen

Specimen type:

Serum

Collection container:

Red serum vial/tube, 5 mL

Volume:

1.0 mL

Minimum volume:

0.2 mL

Collection instructions:

Trough levels are most reproducible

Processing instructions:

Allow sample to clot
Spin within two (2) hours of sample collection
Transfer serum to a Serum/plasma transfer vial/tube (MedTox), labelled as serum

Transport container:

Serum/plasma transfer vial/tube (MedTox)

Alternate specimen type:

Heparin plasma

Alternate collection container:

Dk green heparin (Li or Na), no gel

Alternate collection instructions:

Immediately following collection, mix by inverting 8 - 10 times to prevent clotting

Alternate processing instructions:

Spin within two (2) hours of sample collection
Transfer plasma to a Serum/plasma transfer vial/tube (MedTox), labelled as the appropriate plasma type

Transport and stability:

Refrigerated (preferred)

Ambient (OK) - 3 days

Frozen (OK)

Reason for rejection:

Gel-barrier tubes are not recommended

Performance

Performing lab:

MedTox Laboratories (119): R-MX

Days set up:

Varies

TAT:

6 days

Method:

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

Clinical and Interpretive info

Reference ranges:

Thioridazine: 250 - 1250 ng/mL

Mesoridazine: 150 - 1000 ng/mL

Billing

CPT codes:

G0480

Subject to medical necessity (Y/N):

Yes

LCD/NCD:

Medical necessity

Tracking

Date created:

11/30/2001

Revised date:

12/27/2023

Review date:

12/27/2023