Drug detection periods
Frequently Asked Questions

Approximate values for detection periods
Substance Urine Hair Blood / Oral Fluid
Alcohol 6–24 hours up to 2 days 12–24 hours
Amphetamines (except methamphetamine) 1 to 5 days up to 90 days 12 hours
Methamphetamine 3 to 5 days up to 90 days 1–3 days
MDMA (Ecstasy) 24 hours up to 90 days 25 hours
Barbiturates (except phenobarbital) 1 day up to 90 days 1 to 2 days
Phenobarbital 2 to 3 weeks up to 90 days 4 to 7 days
Benzodiazepines Therapeutic use: up to 7 days. Chronic use (over one year): 4 to 6 weeks up to 90 days 6 to 48 hours
Cannabis 2 to 7 days, up to >30 days after heavy use and/or in users with high body fat up to 90 days Blood: heavy use - 2 weeks, low use - 2–3 days
Saliva: 2-10 hours
Cocaine 2 to 5 days with exceptions for certain kidney disorders up to 90 days 2 to 5 days
Codeine 2 to 3 days
Cotinine (a break-down product of nicotine) 2 to 4 days up to 90 days 2 to 4 days
Morphine 2 to 4 days up to 90 days 1 – 3 days
Heroin 3 to 4 days up to 90 days 1– 2 days
LSD Undetectable Undetectable Undetectable
Methadone 3 days up to 97 days 24 hours
PCP 3 to 7 days for single use; up to 30 days in chronic users up to 90 days 1 to 3 days

Source: Wikipedia