Fan Club
Site Map
 

Drug cutoff levels are the minimum concentrations of drugs or metabolites that must be present in specimens, before labs will report the drug testing results as positive. How much of a drug labs can detect depends on drug detection times, frequency of use, type of specimen, drug testing method, metabolism, and other factors.

Labs that follow the Mandatory Guidelines for Federal Workplace Drug Testing Programs published by the Substance Abuse and Mental Health Services Administration (SAMHSA), first conduct one or more initial screens followed by confirmatory tests. The approved methods for urine analysis are one or more types of immunoassay screens, confirmed by gas chromatography and mass spectrometry. If you test below the drug cutoff levels on the initial screens, the lab cannot report it as positive or continue with the confirmatory tests. If you test above them on the initial screens, but below them on the confirmatory test, the lab still cannot report it as positive.

The tables below are compiled from public-domain information in the Mandatory Guidelines for Federal Workplace Drug Testing Programs. They are for urine analysis of the commonly-abused types of drugs known as the "SAMHSA Five."

Initial Drug Cutoff Levels

Drug

Nanograms per Milliliter (ng/ml)

Marijuana metabolites

50

Cocaine metabolites

150

Opiate metabolites 1

2000

Phencyclidine (PCP)

25

Amphetamines 2

500

1 Labs are permitted to initial test all specimens for 6-acetylmorphine at a 10 ng/ml cutoff
2 Target analyte must be d-methamphetamine and the test must significantly cross-react with MDMA, MDA, and MDEA

 

Confirmatory Drug Cutoff Levels

Drug

Nanograms per Milliliter (ng/ml)

Marijuana metabolite 1

15

Cocaine metabolite 2

100

Opiates
Morphine
Codeine
6-acetylmorphine 4


2000
2000
10

Phencyclidine (PCP)

25

Amphetamines
Amphetamine
Methamphetamine 3
MDMA (Ecstasy)
MDA
MDEA


250
250
250
250
250

1 Delta-9-tetrahydrocannabinol-9-carboxylic acid
2 Benzoylecgonine
3 Specimen must also contain d-amphetamine at a concentration > 100 ng/ml
4 Labs test for 6-acetylmorphine when the morphine concentration exceeds 2,000 ng/ml

ote: As of September 3, 2001, SAMHSA last revised these cutoff levels in 1998 and considers them sound. Other government entities might have their own specifications that differ from those above.

   
UPS Tracking Tell A Friend Copyright Fan Club
 
Navigation Head
Navigation Head