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Drug detection times indicate the period after you last took a drug, that drug testing can reveal its presence or resulting metabolites in your specimen. The amount of time that a drug metabolite remains detectable in urine can vary, depending on the following factors:

Amount and Frequency of Use:
Single, isolated, small doses are generally detectable at the lower boundary. Chronic and long-term use typically result in detection periods near or at the upper boundary.

Metabolic Rate:
Individuals with slower body metabolism are prone to longer drug detection periods.

Body Mass:
In general, human metabolism slows with increased body mass, resulting in longer drug detection periods. In addition, THC (marijuana's active ingredient) and PCP are known to accumulate in fatty lipid tissue. Chronic users, physically inactive users, and individuals with a high percentage of body fat in relation to total body mass are prone to longer drug detection periods for THC and PCP.

Age:
In general, human metabolism slows with age, resulting in longer drug detection periods.

Overall Health:
In general, human metabolism slows during periods of deteriorating health, resulting in longer drug detection periods.

Drug Tolerance:
Users typically metabolize a drug faster once a tolerance to the drug is established.

Urine pH:
Urine pH can impact drug detection periods. Typically, highly acidic urine results in shorter drug detection periods.

Drug detection times are also affected by the type of specimen, the testing method, and cutoff levels. More information can be found in our Drug Testing Books section.

Substance

Proprietary or Street Names

Medical Uses

Route of Administration

DEA Schedule*

Drug Detection Times

Stimulants

Amphetamine

Biphetamine, Dexedrine; Black Beauties, Crosses, Hearts

Attention deficit hyperactivity disorder (ADHD), obesity, narcolepsy

Injected, oral, smoked, sniffed

II

1-2 days

Cocaine

Coke, Crack, Flake, Rocks, Snow

Local anesthetic, vasoconstrictor

Injected, smoked, sniffed

II

1-4 days

Methamphetamine

Desoxyn; Crank, Crystal, Glass, Ice, Speed

ADHD, obesity, narcolepsy

Injected, oral, smoked, sniffed

II

1-2 days

Methylphenidate

Ritalin

ADHD, narcolepsy

Injected, oral

II

1-2 days

Nicotine

Habitrol patch, Nicorette gum, Nicotrol spray, Prostep patch; Cigars, Cigarettes, Smokeless tobacco, Snuff, Spit tobacco

Treatment for nicotine dependence

Smoked, sniffed, oral, transdermal

Not Scheduled

1-2 days

Hallucinogens and Other Compounds

LSD

Acid, Microdot

None

Oral

I

8 hours

Mescaline

Buttons, Cactus, Mesc, Peyote

None

Oral

I

2-3 days

Phencyclidine & Analogs

PCP; Angel Dust, Boat, Hog, Love Boat

Anesthetic (veterinary)

Injected, oral, smoked

I, II

2-8 days

Psilocybin

Magic Mushroom, Purple Passion, Shrooms

None

Oral

I

8 hours

Amphetamine variants

DOB, DOM, MDA, MDMA; Adam, Ecstasy, STP, XTC

None

Oral

I

1-2 days

Marijuana

Blunt, Grass, Herb, Pot, Reefer, Sinsemilla, Smoke, Weed

None

Oral, smoked

I

1 day - 5 weeks

Hashish

Hash

None

Oral, smoked

I

1 day - 5 weeks

Tetrahydrocannabinol

Marinol, THC

Antiemetic

Oral, smoked

I, II

1 day - 5 weeks

Anabolic Steroids

Testosterone (T/E ratio), Stanazolol, Nandrolene

Hormone Replacement Therapy

Oral, injected

III

Oral: up to 3 weeks (for testosterone and others); Injected: up to 3 months (Nandrolene up to 9 months)

Opioids and Morphine Derivatives

Codeine

Tylenol w/codeine, Robitussin A-C, Empirin w/codeine, Fiorinal w/codeine

Analgesic, antitussive

Injected, oral

II, III, IV

1-2 days

Heroin

Diacetylmorphine; Horse, Smack

None

Injected, smoked, sniffed

I

1-2 days

Methadone

Amidone, Dolophine, Methadose

Analgesic, treatment for opiate dependence

Injected, oral

II

1 day - 1 week

Morphine

Roxanol, Duramorph

Analgesic

Injected, oral, smoked

II, III

1-2 days

Opium

Laudanum, Paregoric; Dover's Powder

Analgesic, antidiarrheal

Oral, smoked

II, III, V

1-2 days

Depressants

Alcohol

Beer, Wine, Liquor

Antidote for methanol poisoning

Oral

Not Scheduled

6-10 hours

Barbiturates

Amytal, Nembutal, Seconal, Phenobarbital; Barbs

Anesthetic, anticonvulsant, hypnotic, sedative

Injected, oral

II, III, IV

2-10 days

Benzodiazepines

Ativan, Halcion, Librium, Rohypnol, Valium; Roofies, Tranks, Xanax

Antianxiety, anticonvulsant, hypnotic, sedative

Injected, oral

IV

1-6 weeks

Methaqualone

Quaalude, Ludes

None

Oral

I

2 weeks

Published by the National Institute on Drug Abuse (NIDA) – September 1999

Note: In a small percentage of cases, users may test positive longer than times shown - most notably in cases of long-term chronic abuse, in individuals with significant body mass and/or body fat, and in individuals with health related issues resulting in abnormally slow body metabolism.

   
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