What are the average drug testing detection time periods by drug and test type?

The detection period of any drug (illegal or prescribed) will vary significantly from person to person. The reasons for that could be any of the following features of the person being tested:

Height, weight and amount of body fat (human metabolism slows with increased body mass, resulting in longer drug detection periods)

The age and current health situation (deteriorating health and older age results in longer detection period)

Frequency of use (quantity of drug use each time and how long consistent drug use prior to testing: Single, isolated, small doses are generally detectable at a lower boundary. Chronic and long-term use typically result in detection periods near or at the upper boundary.)

Quality of drug used (Higher quality –potency- will stay longer in the system)

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

The following chart gives some approximate detection periods for each substance by test type. Please keep in mind the above factors that affect the drug testing detection times.

SUBSTANCE	SALIVA	URINE	HAIR
Amphetamine	2-3 days	2-4 days	N/A
Barbiturates	N/A	2-20 days	N/A
Benzodiazepines	N/A	2-40 days	N/A
Marijuana (light use)	1-2 days	2-4 days	up to 90 days
Marijuana (heavy use)	2-4 days	up to 90 days	up to 90 days
Cocaine	2-3 day	4-5 days	up to 90 days
Opiates (Heroin)	2-4 days	2-4 days	up to 90 days
Methamphetamine	3-4 days	3-5 days	up to 90 days
PCP	3-4 days	3-7 days	up to 90 days

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What are the average drug testing detection time periods by drug and test type?

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