Lab test

Benzodiazepine Screen, Blood

This blood test screens for benzodiazepines, a class of sedative-anxiolytic medications.

Typical price

From $49

Results

1-3 business days

Preparation

See preparation notes below

Sample

Blood draw or sample collection at a local center

This blood test screens for benzodiazepines, a class of sedative-anxiolytic medications. It uses an immunoassay, so a positive finding is presumptive and can be followed by confirmation. A blood specimen may be chosen when a clinician wants an indication of recent circulating drug rather than the longer detection window seen in urine. The screening immunoassay can flag the drug class, and a positive finding may be re-tested to identify the specific medication.

• Benzodiazepines A class of sedative medications such as diazepam, lorazepam, and alprazolam detected in blood.

• A clinician is evaluating possible recent benzodiazepine exposure.
• You need a sedative screen using a blood specimen.
• You take a prescribed benzodiazepine and the question is about circulating levels.
• A medical setting requires a rapid drug screen for sedatives.

• No fasting is required before this blood screen.
• List all sedatives, sleep aids, and anti-anxiety medications you take.
• Mention muscle relaxants and other central nervous system medicines.
• Do not stop prescribed medication unless a healthcare provider instructs you to.

A negative blood benzodiazepine screen suggests the drug class was not detected above the cutoff at collection. Since many benzodiazepines clear from blood relatively quickly, a negative result does not rule out earlier use. A positive screen can reflect prescribed medication or a cross-reacting compound, so confirmation may be advised. Discuss the meaning of the result with a healthcare provider.

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