Test Overview
Test Methodology

High Pressure Liquid Chromatography

Test Usage

Useful for optimizing dosage, monitoring compliance, or assessing toxicity.

Reference Range *

Therapeutic Chlordiazepoxide: 100 - 3000 ng/ml; Norchlordiazepoxide: 100 - 1000 ng/ml; Toxic: >5000 ng/ml.

Test Details
Days Set Up
Monday, Wednesday, Friday
Analytic Time

3 days

Soft Order Code
CHLRP
MiChart Code
Chlordiazepoxide (Librium), Level
Synonyms
  • Librium
  • CHLORDIAZEPOXIDE (LIBRIUM)
  • CHLDI
  • NORDIAZ
  • NORDIAZEPAM
Laboratory
Sendout
Reference Laboratory
Warde CHLRP
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect blood in a red top tube; do not use SST tube. Centrifuge, aliquot serum into plastic vial and refrigerate. Protect specimen from light. Decomposition will occur if specimen is stored under fluorescent lights at room temperature for more than 1 day.

Special Handling

Protect specimen from light.

Alternate Specimen
EDTA, Sodium fluoride plasma (lav or grey top tubes)
Rejection Criteria
SST tube not acceptable, not protected from light
Yellow Top Tube
Red Top Tube
Normal Volume
1.0 ml serum
Minimum Volume
0.2 ml serum
Storage Temperature
Refrigerated preferred, frozen acceptable
Additional Information

Test sent to Warde Medical Laboratory.

Billing
CPT Code
80346
Fee Code
32071
LOINC
Z37-2
NY State Approved
No