Lorazepam
Test Mnemonic
LORAZE
CPT Codes
- 80346 / G0480 - QTY (1)
Aliases
- Ativan
Includes
- Lorazepam
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | Potassium oxalate/sodium fluoride (Gray) | Refrigerated | Do not use gel separator tubes. Separate plasma from cells within 2 hours of collection and transfer to standard aliquot tube. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 2 mL | Plasma | Sodium heparin (Green) | Refrigerated | Do not use gel separator tubes. Separate plasma from cells within 2 hours of collection and transfer to standard aliquot tube. | |
| 2 mL | Plasma | EDTA (Lavender) | Refrigerated | Do not use gel separator tubes. Separate plasma from cells within 2 hours of collection and transfer to standard aliquot tube. | |
| 2 mL | Serum | No additive (Red) | Refrigerated | Do not use gel separator tubes. Separate serum from cells within 2 hours of collection and transfer to standard aliquot tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | After separation from cells: 1 week |
| Refrigerated | After separation from cells: 2 weeks |
| Frozen | After separation from cells: 3 years (Avoid repeated freeze/thaw cycles) |
Days Performed
Tue, Fri
Turnaround Time
2 - 8 days
Methodology
| Name | Description |
|---|---|
| Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
Reference Range
| Lorazepam | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Dose-Related Range: 50-240 ng/mL - Dose (Adult): 1-10 mg/d | Toxic: Greater than 300 ng/mL |
Special Info
Specimens collected in gel separator tubes and hemolyzed specimens will be rejected. This test is New York state approved.
Clinical Info
This test is useful to optimize dosing and monitor patient adherence.