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Drug Detection Periods

The length of time any drug stays in your system will vary. This is true for both the illicit drug and the prescribed drug. In large part, it depends on your physiological makeup and metabolism.

The following chart gives approximate detection periods for each substance.[1] The ranges depend on amount and frequency of use, metabolic rate, body mass, age, overall health, and urine pH. For ease of use, the detection times of metabolites have been incorporated into each parent drug. For example, heroin and cocaine can only be detected for a few hours after use, but their metabolites can be detected for several days in urine. In this type of situation, we will report the (longer) detection times of the metabolites.

  • NOTE 1: Oral fluid or saliva testing results for the most part mimic that of blood. The only exception is THC. Oral fluid will likely detect THC from ingestion up to a maximum period of 18-24 hours
  • NOTE 2: Urine can not detect current drug use. It takes approximately 6-8 hours or more post-consumption for drug to be metabolized and excreted in urine.
Substance Time Range (urine)
Alcohol 3-5 days via Ethyl Gluconoride(EtG) metabolite or 10-12 hours via traditional method
Amphetamines (except meth) 1 to 2 days
Methamphetamine 2 to 4 days
Barbiturates (except phenobarbital) 2 to 3 days
Phenobarbital 7 to 14 days
Benzodiazepines Therapeutic use: 3 days. Chronic use (over one year): 4 to 6 weeks
Cannabis Single Use: 5 to 7 days or Prolonged Use: 3 to 4 weeks
Cocaine 2 to 4 days
Codeine 2 days
Cotinine (a break-down product of nicotine) 2 to 4 days
Morphine 2 days
Heroin 2 days
LSD 2 to 24 hours
Methadone 3 days
PCP 14 days; up to 30 days in chronic users