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vThe following chart gives approximate detection periods for each substance by test type.[1]

Approximate values for detection periods[2]
Substance Urine Hair Blood / Oral Fluid
Alcohol 6–24 hours[3] Note: Alcohol tests may measure ethyl glucuronide, which can stay in urine for up to 80 hours up to 90 days[4] 12 to 24 hours
Amphetamines (except methamphetamine) 1 to 4 days[5] up to 90 days 12 hours
Methamphetamine 5 days- up to a week[6] up to 90 days 1 to 3 days[6]
MDMA (Ecstasy) 3 to 5 days up to 90 days 3 to 4 days
Barbiturates (except phenobarbital) 1-4 days or 2-3 weeks up to 90 days 1 to 2 days
Phenobarbital 2 to 3 weeks[7] up to 90 days 4 to 7 days
Benzodiazepines Therapeutic use: up to 7 days. Chronic use (over one year): 4 to 6 weeks up to 90 days 6 to 48 hours
Cannabis Passive inhalation: up to 22 minutes** Predefinição:Br Infrequent users: 7–10 Days Predefinição:Br Heavy users: 30 to 100 days[8][9][10] up to 90 days[8] 2 to 3 days in blood, up to 2 weeks in blood of heavy users[8] However, it depends on whether actual THC or THC metabolites are being tested for, the latter having a much longer detection time than the former. THC (found in marijuana) may only be detectable in saliva/oral fluid for 2 to 24 hours in most cases, though in rare cases has been detected up to 28 days after consumption.[11]
Cocaine 2 to 5 days (with exceptions for heavy users who can test positive up to 4/6 weeks, and individuals with certain kidney disorders) up to 90 days 2–10 days, heavy users or individuals with previous substance use 6/8 weeks
Codeine 2 to 3 days up to 90 days 1 to 4 days
Cotinine (a breakdown product of nicotine) 2 to 4 days up to 90 days 2 to 4 days
Morphine 2 to 4 days up to 90 days 1 to 3 days
Tricyclic antidepressants (TCA's) 7 to 10 days Undetectable[12] Detectable but dose relationship not established.
LSD 1-4 days (including metabolites) up to 4 days[carece de fontes?] 2 to 4 days
Methadone 7 to 10 days up to 90 days 24 hours
Steroids 3 to 30 days
PCP 3 to 7 days for single use; up to 30 days in chronic users[13] up to 90 days 1 to 3 days[13]
  1. "Drugs of Abuse Reference Guide," Pinnacle BioLabs, Retrieved online April 11, 2007.
  2. «Heroin Test - Heroin Drug Test - Testing Blood - Urine Tests». TheGoodDrugsGuide. Consultado em 11 de maio de 2016 
  3. Erowid Alcohol Vault : Drug Testing. Erowid.org. Retrieved on August 7, 2011.
  4. "Hair Alcohol Testing (EtG)". Psychemedics.com. Retrieved on June 23, 2016.
  5. Erowid Amphetamine Vault : Drug Testing. Erowid.org. Retrieved on September 5, 2013.
  6. a b Erowid Methamphetamine Vault : Drug Testing. Erowid.org. Retrieved on September 5, 2013.
  7. Erowid Barbiturates Vault : Drug Testing. Erowid.org. Retrieved on August 7, 2011.
  8. a b c Erowid Cannabis (Marijuana) Vault : Drug Testing. Erowid.org (2010-02-28). Retrieved on August 7, 2011.
  9. Marijuana Detection Time Shorter Than Previously Assumed. norml.org (2006-02-23). Retrieved on March 13, 2012.
  10. Susan Squibb (9 de março de 2016). «How long does weed stay in your system?». The Cannabist. Consultado em 25 de maio de 2016. Arquivado do original em 11 de março de 2016 
  11. Lee, Dayong (2013). «Current Knowledge on Cannabinoids in Oral Fluid». Drug Testing and Analysis. 6 (1–2): 88–111. PMC 4532432Acessível livremente. PMID 23983217. doi:10.1002/dta.1514 
  12. «2D6O - Clinical: Cytochrome P450 2D6 Genotype, Saliva». mayomedicallaboratories.com 
  13. a b Erowid PCP Vault : Drug Testing. Erowid.org (2009-11-03). Retrieved on August 7, 2011.