A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Clorazepate (Tranxene®)
Test CodeCLOR
Alias/See Also
90854
CPT Codes
80299
Preferred Specimen
2 mL serum collected in a red-top tube (no gel)
Minimum Volume
1 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube or ACD (yellow-top) tube
Instructions
Serum separator tubes (SST) are not acceptable; use polypropylene tubes
Note: Assayed as its primary metabolite, Nordiazepam.
Note: Assayed as its primary metabolite, Nordiazepam.
Transport Container
Transport tube
Transport Temperature
Frozen
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 7 days
Frozen: 60 days
Refrigerated: 7 days
Frozen: 60 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Serum separator tube (SST)
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Set up: Fri; Report available: 2-9 days after receipt at the performing laboratory. Add three (3) days for transport.
Reference Range
Nordiazepam | 100-500 ng/mL |
Clinical Significance
Orally administered clorazepate is rapidly decarboxylated to its metabolite, nordiazepam. There is essentially no circulating patent drug. Nordiazepam elimination half-life is about 40 to 50 hours. Plasma levels of nordiazepam increase proportionally with clorazepate dose and show moderate accumulation with repeated administration.
Performing Laboratory
Quest Diagnostics Nichols Institute Valencia
27027 Tourney Road
Valencia, CA 91355-5386
Last Updated: June 22, 2023