How long can a drug stay in the system?

Approximate detection times.

Drug

Urine

Saliva

Amphetamine

1-4 Days

Up to 2 Days

Barbiturates

1 Day (Short acting drugs)
2-3 Weeks (long acting drugs)

Up to 2 Days

Benzodiazepines

3-7 Days
3 Weeks (prlonged use)

Up to 2 Days

Cocaine

2-4 Days
7 Days (chronic use)

Up to 2 Days

Methadone

3 Days

Up to 2 Days (Occasional Use)
Up to 3-5 Days (Chronic Use)

Methamphetamine

See Amphetamine

Phencyclidine (PCP)

5-8 Days
Up to 30 Days (chronic use)

Up to 2 Days

THC

5 Days (moderate use)
10 Days (heavy use)
30+ Days (chronic use)

Up to 2 Days

Note: The above chart gives approximate detection periods. The ranges depend on frequency of use, body metabolism and rate, body mass, age, drug tolerance etc..

When and Why to Choose:

Oral Fluid (Saliva)

Urine

Hair

Recent use which indicates the user was under influence at time of collection.

Correlates more closely with blood than urine or hair.

Longer detection of drugs and their metabolites.

Economic alternative to saliva and hair.

90 Day Detection

Drugs used in chronic manner.

Assists in history of drug use.

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