Test Overview

Test Methodology

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

Test Usage

Monitoring clobazam therapy

Reference Range*

CLOBAZAM: Therapeutic Range: 30-300 ng/mL
NORCLOBAZAM: Therapeutic Range: 300-3,000 ng/mL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details

Days Test Performed

Monday - Friday

Analytic Time

2 - 6 days

Soft Order Code




Laboratory Reference


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Specimen Requirements

Offsite Collection Instructions

Draw specimen in a red top tube, immediately before the next dose. Spin within 2 hours of collection, and aliquot into a plastic, screw capped tube. Send to Specimen Processing refrigerated.


Red Top Tube

Normal Volume

0.5 mL serum

Minimum Volume

0.35 mL serum

Additional Information

Test performed by Mayo Clinic Laboratories

Billing Information

Fee Codes

CPT Code


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