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Chlordiazepoxide (Librium)
Test CodeLIB
Alias/See Also
Chlordiazepoxide and Metabolites
Quest Code
91123
Quest Code
91123
CPT Codes
80346
Includes
Chlordiazepoxide
Norchlordiazepoxide
Nordiazepam
Norchlordiazepoxide
Nordiazepam
Preferred Specimen
2 mL serum collected in a no additive (red-top) tube, transferred to a plastic screw-cap vial
Minimum Volume
1 mL
Patient Preparation
Collect at trough concentration, i.e. just before the administration of the next dose.
Patient Preparation
Collect at trough concentration, i.e. just before the administration of the next dose.
Instructions
Refrigerate within 1 hour.
Transport Temperature
Refrigerated
Specimen Stability
Room temperature: unacceptable
Refrigerated: 5 days
Frozen: 14 days
Refrigerated: 5 days
Frozen: 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Collection in serum separator tube (SST)
Methodology
Liquid Chromatography / Tandem Mass Spectrometry (LC/MS/MS)
Setup Schedule
Friday a.m.
Report Available
6 days
Performing Laboratory
Quest Diagnostics Nichols Institute
Valencia, CA