Benzodiazepine test
Quick answer: This test checks blood or urine for benzodiazepines, a group of medicines used for anxiety, sleep and seizures. It is done in emergencies, to monitor prescribed use, or for legal or workplace screening.
- SampleBlood or urine
- TakesA few minutes for urine; about 5 minutes for blood
- Before the testNo special preparation is usually needed; tell staff about all medicines you take.
How the test is done
- 1You give a urine sample, or blood is drawn from a vein
- 2Staff label and seal the sample
- 3The lab screens for benzodiazepines
- 4A positive screen may go for confirmation testing
What your results can mean
Reading your report
A positive screen is usually confirmed by another method, so discuss it with your doctor.
If the result is outside the usual range
A positive result means benzodiazepines were detected, which can come from prescribed medicines for anxiety, sleep or seizures. Some benzodiazepines are not picked up by all screens, so a negative does not always rule out use.
Who usually has this test
People with unexplained drowsiness or overdose, people on prescribed benzodiazepines who need monitoring, and people needing legal or workplace screening.
Risks and aftercare
Urine carries no risk; a blood draw may leave a small bruise.
Names and options
Also called: benzo screen, benzodiazepines
Options
- Blood (serum)
- Urine (qualitative)
Listed by the hospital as
- BENZODIAZAPINE, SERUM
- BENZODIAZAPINE, URINE (QUALITATIVE)
Questions about this test
Will my sleeping tablet show up on a benzodiazepine test?
Many sleeping and anxiety medicines are benzodiazepines and may show up. Tell staff about every medicine you take before the test.
Why can a benzodiazepine screen be negative even after use?
Some screening tests do not detect every benzodiazepine, especially in low doses. A more specific lab test may be needed.
How long do benzodiazepines stay in urine?
It can be a few days for short-acting types and longer for long-acting ones or regular use. The exact time varies by person.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.