UScreen Drug Test Cut-Off Levels and Detection Times

Drug	Cut-Off Level	Minimum Detection Time *	Maximum Detection Time *
Marijuana (THC)	50 ng/ml	2 hours	Up to 5+ days
Cocaine (COC)	300 ng/ml	1 – 4 hours	2 – 4 days
Amphetamine (AMP)	1000 ng/ml	2 – 7 hours	2 – 4 days
Methamphetamine (MET)	1000 ng/ml	2 – 7 hours	2 – 4 days
Morphine (MOP)	300 ng/ml	2 hours	2 – 3 days
Morphine (2000) Opiates	2000 ng/ml	2 hours	2 – 3 days
Methylenedioxymethamphetamie (MDMA)	500 ng/ml	2 – 4 hours	2 – 4 days
Barbiturate (BAR)	300 ng/ml	2 – 4 hours	1 – 3 weeks
Benzodiazepines (BZO)	300 ng/ml	2 – 7 hours	1 – 4 days
Methadone (MTD)	300 ng/ml	3 – 8 hours	1 – 3 days
Oxycodone (OXY)	100 ng/ml	1 – 3 hours	1 – 2 days
Phencyclidine (PCP)	25 ng/ml	4 – 6 hours	7 – 14 days
Tri-Cyclic Antidepressants (TCA)	1000 ng/ml	8 – 12 hours	2 – 7 days
Buprenorphine (BUP)	10 ng/ml	4 hours	1 – 3 days

* Detection times are not guaranteed.

This assay provides only a preliminary test result. A more specific alternative chemical method must be used in order to obtain a confirmed analytical result. Gas chromatography/mass spectrometry (GC/MS) is the preferred confirmatory method. Clinical consideration and professional judgment should be applied to any drug of abuse test result, particularly when preliminary results are positive.