Drug & Nicotine Testing Kits Cutoff Levels & Detection Times
Detection period – the amount of time after a person consumes a drug that a drug test can still show a positive result. For example, after a person consumes marijuana, a marijuana urine test can detect the drug for approximately up to a week afterward.
Cutoff level – the minimum amount of a drug that has to be present in a specimen in order for it to be considered positive. For example, the cutoff level for marijuana in a urine specimen for an instant testing kit is 50 ng/mL. If marijuana is present in a sample, but the level is below 50 ng/mL, the test would give a negative result. If marijuana is present and the level is above 50 ng/mL, the test would show a positive result.
Cutoff levels vary for different types of tests.
Urine drug testing cutoff levels are expressed in nanograms per milliliter (ng/mL) or as a weight of drug per unit volume of urine. Hair drug testing cutoff levels are expressed in picograms per milligram (pg/mg) or as a weight of drug per unit weight of hair.
|Screen Cut-Off||GC / MS Cut-Off||L.O.D. Level|
|Amphetamines Amphetamine, Methamphetamine & Ecstasy||300 – 500pg/mg*||200- 500pg/mg*||100 pg/mg|
|Cocaine Cocaine & Benzoylecgonine||300 – 500pg/mg*||Cocaine: 200 – 500pg/mg*
|Phencyclidine PCP||300pg/mg||100 – 300pg/mg*||100 pg/mg|
|Opiates Codeine, Morphine & 6-MAM(Heroin metabolite)||200 – 500pg/mg*||200 – 300 pg/mg*||100 pg/mg|
|Marijuana THC, Carboxy-THC||0.1 – 1 pg/mg*||THC: 0.3 – 50 pg/mg*
Carboxy-THC: 1 pg/mg
|Barbiturates||500 pg/mg||200 pg/mg||–|
|Benzodiazepines||500 pg/mg||200 pg/mg||–|
|Propoxyphene||500 pg/mg||Propoxyphene: 200 pg/mg
Norpropoxyphene: 200 pg/mg
|Methadone||500 pg/mg||Methadone: 200 pg/mg
EDDP: 200 pg/mg
|Oxycodone Oxycotin, Percodan/Percocet||300 pg/mg||300 pg/mg||–|
|Hydrocodone Vicodin, Lortab/Lorcet||300 pg/mg||300 pg/mg||–|
|Hydromorphone Dilaudid||300 pg/mg||300 pg/mg||–|
|Cut-Off Level||EIA Screen Cutoff Level||GC/MS Confirmation Cutoff Level||Approximate Detection Time in Saliva|
|Amphetamine (AMP)||1000 ng/mL||1000 ng/mL||500 ng/mL||1-3 Days|
|Methamphetamine (MET)||1000 ng/mL||1000 ng/mL||500 ng/mL||1-3 Days|
|Cocaine (COC)||300 ng/mL||300 ng/mL||150 ng/mL||1-3 Days|
|THC (THC)||50 ng/mL||50 ng/mL||15 ng/mL||6 -12 Hours|
|Opiates (OPI)||2000 ng/mL||2000 ng/mL||2000 ng/mL||1-3 Days|
|Phencyclidine (PCP)||25 ng/mL||25 ng/mL||25 ng/mL||1-3 Days|
|Screen Cut-Off||GC/MS Cutoff|
|Marijuana||1 pg/mg||THC: 50 pg/mg
Carboxy-THC: 1 pg/mg
|Amphetamine||500 pg/mg||200 pg/mg|
|Methamphetamine||500 pg/mg||200 pg/mg|
|Cocaine||500 pg/mg||Cocaine: 200 pg/mg
Benzoylecgonine: 50 pg/mg
|Opiates (Codeine, Morphine)||200 pg/mg||200 pg/mg|
Detection time : 4 Hours – 4 Days
* The above charts give approximate detection periods for each substance by test type. The ranges depend on amount and frequency of use, metabolic rate, body mass, age, overall health, drug tolerance, and urine pH. Please call us for detailed information.