Drugs of Abuse Reference Guide

Drug group EIA screen cutoff level* (ng/mL**) GC/MS confirmation (ng/mL**) Detection Times in Urine Amphetamines (amphetamine and  methamphetamine) 1,000 500 1-2 days Cocaine metabolite 300 150 2-4 days Marijuana metabolites 50 15 Single use 1-7 days Prolonged use 1-2 months Opiates (codeine and morphine) 2,000 2,000  2 days  Phencyclidine 25 25 14- 30 days chronic users Barbiturates 300 200 Short acting 1-2 days Long acting 1-3 weeks Benzodiazepines 300 200 Theraputic dose 3 days Chronic 4- 6 weeks Methadone 300 200 3 days Propoxyphene 300 200 6 hours - 2 days Ethyl Alcohol .02 .02 1-12 hours MDMA  500 250 1-2 days

* These are standard cutoff levels; alternate cutoff levels may be available.
** Nanograms per milliliter; the above cutoff levels, list of analytes and test methodologies are subject to change when required by applicable government regulations or guidelines.