The complete guide to detection times
How long can different drugs be detected? An overview of detection times for common substances.
Detection time is the period during which a substance or its metabolites can be detected in a sample. The detection time varies depending on the substance, sample type and individual factors.
Factors that affect detection time
- Type of substance and dosage
- Frequency of use
- Metabolism and body mass
- Sample type (saliva, urine, blood)
- Sensitivity of the analytical method
Common substances and approximate detection times
Cannabis (THC)
Occasional use: 3-4 days in urine
Regular use: Up to 30 days in urine
Saliva: 24-72 hours
Amphetamine
Urine: 2-4 days
Saliva: 1-3 days (longest of all sample types)
Cocaine
Urine: 2-4 days
Saliva: 24-48 hours
Opioids
Urine: 2-4 days
Saliva: 24-48 hours
Benzodiazepines
Urine: 3-7 days (short-acting), up to 30 days (long-acting)
Blood: Best for exact quantification
Important information
These times are approximate and can vary considerably. Our laboratory analyses using LC-MS/MS technology have very low cut-off levels, which gives longer detection times compared with rapid tests.
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