Chart

Drug Duration

**NOTE: This chart is for reference only and gives approximate detection periods for each substance by test type. The ranges depend on amount and frequency of use, metabolic rate, age, overall health, drug tolerance, and urine pH.

Drug Cut-Off Level Approximate Detection Time in Urine Approximate Detection Time in Saliva
Amphetamine (AMP) 1,000 ng/ml 2-4 days 1-3 days
Barbiturates (BAR) 300 ng/ml 4-7 days
Benzodiazepines (BZO) 300 ng/ml 3-7 days
Cocaine (COC) 300 ng/ml 2-4 days 1-3 days
Ecstasy (MDMA) 500 ng/ml 1-3 days
Methadone (MTD) 300 ng/ml 3-5 days
Methamphetamine (MET) 1,000 ng/ml 3-5 days 1-3 days
Opiates (MOR) 300 ng/ml 2-4 days
Opiates (OPI) 2,000 ng/ml 2-4 days 1-3 days
Phencyclidine (PCP) 25 ng/ml 7-14 days 1-3 days
Marijuana (THC) 50 ng/ml 15-30 days 6-12 hours
Propxyphene (PPX) 300 ng/ml 1-2 days
Oxycodone (OXY) 100 ng/ml 2-4 days