May 2023: New Test – Clozapine (CLOZA)

Clinical Updates

New Test: Clozapine (CLOZA)

Effective May 23, 2023.

Therapeutic drug monitoring for clozapine will be offered as an in-house test starting Tuesday, May 23, 2023.

The current send-out test, Clozapine and Metabolites, Serum or Plasma, Quantitative (CLOZSP), currently sent out to ARUP Laboratories, will be discontinued on June 20, 2023.

Clozapine (CLOZA)

New Test – CLOZA

Specimen Type
Red Serum Tube (No Additive)

Methodology
Turbidimetric immunoassay

Result Components
Clozapine

Days Performed
Monday – Saturday

Turnaround Time
1-4 days

Clozapine results greater than 1000 ng/mL have been designated as urgent.

Sendout Test – CLOZSP

Specimen Type
Red Serum Tube (No Additive) or Lavender K2EDTA Tube

Methodology
Liquid chromatography-tandem mass spectrometry

Result Components
Clozapine
Norclozapine
Clozapine-N-Oxide

Days Performed
Sunday – Saturday

Turnaround Time
2-4 days