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Drug testing standards are regulated by a number of guidelines. What drug is being tested for varies greatly based on testing company, expense, expectations, federal & provincial requirements, etc. Following is a description of what to expect from the standard tests.
The NIDA 5
Federal government guidelines (by NIDA -The National Institute on Drug Abuse and SAMHSA -The Substance Abuse and Mental Health Services Administration) require that companies which use commercial class drivers licenses for employees must have a testing system in place. Among other things, this required testing program must test for 5 specific categories of drugs (sometimes referred to as the "NIDA 5"). Because of this federal requirement, most drug testing companies offer a basic drug test which checks for drugs in these 5 common categories.
- Amphetamines (amphetamines, methamphetamines, speed)
- Cannabinoids (marijuana, hash)
- Cocaine (cocaine, crack, benzoylecognine)
- Opiates (heroin, opium, codeine, morphine)
- Phencyclidine (PCP)
Drug Test Sensitivity Standards
The Substance Abuse and Mental Health Services Association (SAMHSA) provides guidelines for what qualifies as a positive drug test. If a test does not give results higher than the guidelines, it does not qualify as a "positive" test. If an immunoassay test gives positive results, a second Gas Chromatography test must also give positive results before a result of "positive" is announced. The following chart shows the guidelines by substance.
| SUBSTANCE |
IMMUNOASSAY Qualitative |
GC / MS Quantitative |
| Marijuana |
50 ng/ml |
15 ng/ml |
| Cocaine |
300 ng/ml |
150 ng/ml |
| Opiates |
300 ng/ml |
300 ng/ml |
| Amphetamines |
1000 ng/ml |
500 ng/ml |
| PCP |
25 ng/ml |
25 ng/ml |
more info on NIDA -5
Expanded Tests
These are some other common drugs that companies require testing for:
- Barbituates (Phenobarbital, Secobarbitol, Butabital)
- Hydrocodone (Lortab, Vicodin)
- Methaqualone (Qualuudes)
- Benzodiazepines (Valium, Librium, Serax, Rohypnol)
- Methadone
- Propoxyphene (Darvon compounds)
- Ethanol (Alcohol)
- MDMA (Ecstasy)
Additional Test Substances
In addition, there are a few other substances which it is possible - but quite unusual to test for:
- LSD
- Hallucinogens (Psilocybin, Mescaline, MDMA, MDA, MDE)
- Inhalents (Toluene, Xylene, Benzene)
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