Drug Detection Times

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.

Hair Drug Testing
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*
Benzoylecgonine:50 pg/mg
100 pg/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
0.1 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
Urine Drug Testing
Cut-Off Level EIA Screen Cutoff Level GC/MS Confirmation Cutoff Level Approximate Detection Time in Urine
Amphetamine (AMP) 1000 ng/mL 1000 ng/mL 500 ng/mL 2-4 Days
Amphetamine (AMP300) 300 ng/mL 1000 ng/mL 500 ng/mL 2-4 Days
Methamphetamine (MET) 1000 ng/mL 1000 ng/mL 500 ng/mL 3-5 Days
Methamphetamine (MET500) 500 ng/mL 1000 ng/mL 500 ng/mL 3-5 Days
Cocaine (COC) 300 ng/mL 300 ng/mL 150 ng/mL 2-4 Days
Cocaine (COC150) 150 ng/mL 300 ng/mL 150 ng/mL 2-4 Days
THC (THC) 50 ng/mL 50 ng/mL 15 ng/mL 15-30 Days
Opiates (OPI) 2000 ng/mL 2000 ng/mL 2000 ng/mL 2-4 Days
Opiates (MOR) 300 ng/mL 2000 ng/mL 2000 ng/mL 2-4 Days
Phencyclidine (PCP) 25 ng/mL 25 ng/mL 25 ng/mL 7-14 Days
Barbiturates (BAR) 300 ng/mL 300 ng/mL 150 ng/mL 4-7 Days
Benzodiazepines (BZO) 300 ng/mL 300 ng/mL 150 ng/mL 3-7 Days
Methadone (MTD) 300 ng/mL 300 ng/mL 150 ng/mL 3-5 Days
Propxyphene (PPX) 300 ng/mL 300 ng/mL 150 ng/mL 1-2 Days
Ecstasy (MDMA) 500 ng/mL 1-3 Days
Tricyclic Antidepressants (TCA) 1000 ng/mL 7-10 Days
Hydrocodone 300 ng/mL 300 ng/mL 2-4 Days
Hydromorphone 300 ng/mL 300 ng/mL 2-4 Days
Oxycodone (OXY) 100 ng/mL 100 ng/mL 2-4 Days
Oxymorphone 100 ng/mL 100 ng/mL 2-4 Days
Saliva Drug Testing
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
Nail Drug Testing
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

Nicotine Testing

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.