| Name | lorazepam |
| Categories | benzodiazepine |
| Specimen requirements | 1 ml of serum |
| Procedure remarks | Take the sample at the end of a dosing interval, half-life period: 10-22 h, The half-life period depends on age, height and weight. |
| Methodology | HPLC (high-performance liquid chromatography) |
| Reference ranges | 20-250 µg/l, toxic starting at 300 µg/l |
| Remarks | Testing currently takes place in a contract laboratory |