ARUP's Laboratory Test Directory

Lorazepam : 0090181

Mnemonic: LORAZ

Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed: Mon, Thu
Reported: 1-4 days
Specimen Required: Collect: Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2EDTA).

Specimen Preparation: Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).

Stability (collection to initiation of testing): After separation from cells: Ambient: 12 hours; Refrigerated: 5 days; Frozen: 2 weeks

Reference Interval:
Dose-Related Range:
50-240 ng/mL - Based on dosages up to 10 mg/d.
Toxic: > 300 ng/mL
CPT Code(s): 80154
Cross References: Ativan (Lorazepam)