The table below gives the detection times for different drugs, according to usage.
DETECTION PERIODS
| SUBSTANCE | URINE | HAIR |
|---|---|---|
| Alcohol | 6-12 hrs | n/a |
| Amphetamines | 4-5 days | up to 90 days |
| Barbiturates | 2-12 days | n/a |
| Benzodiazepines | 1-42 days | n/a |
| Cannabis (single use) | 24-72 hrs | up to 90 days |
| Cannabis (habitual use) | up to 12 wks | |
| Cocaine | 4-5 days | up to 90 days |
| Codeine/Morphine | 2-4 days | up to 90 days |
| Heroin | 2-4 days | up to 90 days |
| PCP | 2-10 days | up to 90 days |
| Opiates | 2-4 days | N/A |