Scientific Library on Drugs & Alcohol

Your source of information assisting in drugs abuse defense

> Drugs and other Substances

Drugs of Abuse Reference Guide

Drug	GC/MS Confirmation Cut-Off Level of Lab	Detection Time in Urine	How Used by the Person
Amphetamines Methamphetamines	250 ng/ml	1-3 days	orally, inhaled, injected
Cocaine	100 ng/ml	2-4 days	inhaled or injected
Cannabinoids	15 ng/ml	3-5 days to 11 weeks	smoked or eaten
Phencyclidine (PCP)	25 ng/ml	15-30 days	orally, injected or smoked
Opiates	2000 ng/ml	1-3 days	smoked, eaten or injected
Ecstasy	250 ng/ml	1-3 days	orally, injected
Propoxyphene	300 ng/ml	1-2 days	orally
Barbiturates	200 ng/ml	short acting 1 day long acting 2-3 weeks	orally
Benzodiazepines	200 ng/ml	extended use: 4-6wks chronic use: 6-12 mo	orally
Methadone	300 ng/ml	3 days	orally
Methaqualone	300 ng/ml	2 weeks	orally
Ethyl (Alcohol)	0.04%	1-12 hours	orally

Click on each of the categories above, to find out detailed information…

> Specimen Validity Testing

To assure the urine specimen is not altered to interfere with drug identity or drug level. Commercial products are available to add to urine to interfere with drug identification. Labs can determine such by finding the following:

Nitrites: detects existence of Nitrites > 500mg level=Adulterated Specimen pH<3 or > 11.
Chromium (VI)> 50 ug/mL
Surfactant &100 ug/mL dodecylbbenzene sulfonate–equivalent
Presence of: halogen, glutaraldehyde, or pyridium at or above level of detection
Presence of: any other adulterant found.

Note: Equates to having a positive drug test in absence of a drug