How Long Do Drugs Stay in the Body?

Duration depends on the biological matrix

May 17, 2019
Clinical Lab Manager

Workplace drug testing is based on the Substance Abuse and Mental Health Administration’s 5-panel immunoassay commonly referred to as SAMHSA-5. This panel traditionally tests five categories of drugs: amphetamines, marijuana, cocaine, opiates, and phencyclidine (PCP). Most commercially available drug screens also test for alcohol, barbiturates, benzodiazepines, MDMA (ecstasy), and synthetic opioids (oxycodone, hydrocodone, buprenorphine, and methadone) in addition to the SAMSHA-5 panel.

The duration over which these drugs can be detected depends upon the biological matrix in which they are tested.

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