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Detection windowsDrug and alcohol test types, by detection window.
Recent impairment, a pattern over months, or proof of alcohol abstinence. Each needs a different specimen.
Inside the labNow
Breath alcohol
Current alcohol level only. Handheld or remote device with photo ID.
24–48 h
Oral fluid
Observed swab. Best for very recent use.
1–3 days
Urine
Most drugs. Lab or point of care, confirmed in the lab.
~80 h
EtG / EtS urine
Alcohol markers that outlast breath testing.
2–4 wks
PEth blood spot
Finger-prick alcohol biomarker. Shows drinking patterns.
~90 days
Hair
Standard head-hair sample. Shows use over months.
Typical windows only. They vary with substance, dose, frequency of use, metabolism and laboratory cut-offs.
Every specimen is collected under chain of custody, and every non-negative is confirmed and reviewed by a physician.