Detection Times – June 2009
We have included a table of detection times for drugs and alcohol as a rough guideline.
The cut offs allow you to have some drugs and alcohol in your system without the test coming back positive.
|
DRUG
|
Detection Time
|
Cut-off
|
|
Amphetamines (incl P & E)
|
1 – 4 days
|
300ng/ml
|
|
Benzodiazepines
|
Up to 2 weeks
|
200ng/ml
|
|
Cocaine
|
2 – 3 days
|
300ng/ml
|
|
Methadone
|
2 – 4 days
|
|
|
Opiates
|
2 – 3 days
|
300ng/ml
|
|
LSD
|
1 – 3 days
|
|
|
GHB (Fantasy)
|
12 hours
|
|
|
Ketamine
|
2 – 4 days
|
|
|
Alcohol
|
<12 hours
|
400mcg/ml
|
|
|
|
|
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CANNABINOIDS (THC) Cut-off: 15ng/ml
|
||
|
1 – 2 joints
|
1 – 4 days
|
|
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Oral ingestion
|
1 – 5 days
|
|
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Moderate (4 joints per wk)
|
5 days
|
|
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Heavy (daily use)
|
10 days
|
|
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Chronic (over 5 joints per day)
|
14 – 30 days
|
|