Benzodiazepine Blood Test in California

What this test measures

A blood benzodiazepine screen looks for drugs in the benzodiazepine class in a serum sample. Blood levels tend to reflect recent exposure rather than use over a longer period, which makes the timing of collection important. It is one option among several sample types used for drug screening.

The laboratory typically runs an immunoassay first, then confirms any presumptive positive with a more specific technique. Because blood concentrations of many benzodiazepines are low and fall quickly, this test is most useful when collection happens close to the relevant time frame. The report lists which compounds were detected.

Results are interpreted with the person's medication history and the reason for testing. Prescribed benzodiazepines will appear on the report, and some other medications can cross-react with screening assays. A qualified healthcare provider or the requesting program reviews the findings in context.