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What is the window of detection for drugs in urine, saliva, sweat, and hair?

March 1, 2012 by Jennie Lee-Pace Leave a Comment

In general, the window of detection in saliva is shorter than testing any other medium.  The presence of drugs in saliva is more likely to indicate current intoxication from the drug, especially for marijuana.  Sweat and hair offer longer look-back windows, as both of these testing methods continuously monitor an individual’s drug use.  The following table gives estimates for the window of detection for the most commonly abused drugs.

Drug Detection Time in Urine Detection Time in Saliva Detection Time in Sweat* Detection Time in Hair**
Amphetamine (AMP) 2 – 4 Days 1 – 3 Days 7 Days 90 Days
Barbiturates (BAR) 4 – 7 Days      
Benzodiazepines (BZO) 3 – 7 Days      
Cocaine (COC) 2 – 4 Days 1 – 3 Days 7 Days 90 Days
Ecstasy (MDMA) 1 – 3 Days      
Methadone (MTD) 3 – 5 Days      
Methamphetamine (MET ) 3 – 5 Days 1- 3 Days    
Opiates (MOR) 2 – 4 Days   7 Days 90 Days
Opiates (OPI) 2 – 4 Days 1 – 3 Days 7 Days 90 Days
Phencyclidine (PCP) 7 – 14 Days 1 – 3 Days 7 Days 90 Days
THC (THC) 3 – 14 Days 6 – 12 Hours 7 Days 90 Days
Tricyclic Antidepressants (TCA) 7 – 10 Days      
Propoxyphene (PPX) 1 – 2 Days      
Oxycodone (OXY) 2 – 4 Days      

* The subject typically wears the sweat patch for seven days.  The sweat patch continuously monitors drug use throughout the wear period.

** The typical hair specimen is 1 ½ inches of hair closest to the scalp, which equates to 90 days of hair growth.

 

 

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Since 1982, AlcoPro has supplied and manufactured the most accurate drug and alcohol testing instruments, kits, and supplies for professional use. We take pride in maintaining our industry-wide reputation for accuracy and quality as we help you—our top priority—perform alcohol and drug screenings and tests with greater precision and confidence.

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