In law enforcement terms, how do intoxication and impairment differ?

• A. Intoxication and impairment are identical concepts.
• B. Impairment refers to deficits in functioning due to drug effects, whereas intoxication refers to the presence of a drug in the body.
• C. Impairment is measured solely by blood tests.
• D. Intoxication excludes any mental effects.

Answer: (B)

Intoxication versus impairment revolves around two different ideas: whether the drug is in the body, and how that drug is affecting functioning. Intoxication means the drug is present in the body and can be detected with tests. Impairment means the person’s functioning—cognitive abilities, coordination, reaction time, judgment—is actually deficient due to the drug’s effects. In law enforcement, you often see impairment assessed through observations and field tests of performance, while intoxication is shown by chemical tests confirming the drug’s presence. So the statement that impairment is deficits in functioning due to drug effects, whereas intoxication is the presence of a drug in the body, best captures the distinction. The other ideas are off: they treat the concepts as the same, rely only on blood tests to measure impairment, or say intoxication excludes mental effects, all of which don’t align with how these terms are used in practice.