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Thioridazine and Mesoridazine, Serum or Plasma

CPT 80299
Synonyms
  • Mellaril®

Test Details

Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Result Turnaround Time

7 - 14 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Use

Therapeutic drug management

Specimen Requirements

Specimen

Serum or plasma

Volume

1 mL

Minimum Volume

0.5 mL

Container

Red-top tube or green-top (heparin) tube. Gel-barrier tubes are not recommended.

Collection Instructions

Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.

Reference Range

Thioridazine: 250−1250 ng/mL; mesoridazine: 150−1000 ng/mL

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.

Patient Preparation

Trough levels are most reproducible.

Causes for Rejection

Gel-barrier tubes

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
811927 Thioridazine (Mellaril) 808260 Thioridazine ng/mL 4052-7
811927 Thioridazine (Mellaril) 808264 Mesoridazine ng/mL 3760-6
Order Code811927
Order Code NameThioridazine (Mellaril)
Order Loinc
Result Code808260
Result Code NameThioridazine
UofMng/mL
Result LOINC4052-7
Order Code811927
Order Code NameThioridazine (Mellaril)
Order Loinc
Result Code808264
Result Code NameMesoridazine
UofMng/mL
Result LOINC3760-6