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Key definitions
['Drug and Alcohol Testing - DOT']

- Several key definitions apply to driver conduct for FMCSA-DOT drug and alcohol testing.
The following key definitions are used to describe aspects of driver conduct for those subject to the Federal Motor Carrier Safety Administration (FMCSA) drug and alcohol program regulations:
- Alcohol — The intoxicating agent in beverage alcohol, ethyl alcohol, or other low molecular weight alcohols, including methyl or isopropyl alcohol
- Drugs — Under Department of Transportation (DOT) drug testing regulations, “drugs” are those for which tests are required, including:
- Marijuana
- Cocaine
- Amphetamines
- Phencyclidine (PCP)
- Opioids
- Subpart B of Part 382 — DOT drug and alcohol prohibitions cited in 382.201 through 382.217 for drivers in safety-sensitive positions. Engaging in any of the prohibited activities results in a DOT testing violation.