What "Driving Under the Influence" Actually Means
Last reviewed: 2026 · Driviology Road Safety Education Team
Quick Answer
"Driving under the influence" broadly refers to operating a vehicle while impaired by alcohol, drugs, or a combination of both, covering the general concept before any specific legal charge is applied.
The phrase "driving under the influence" is often used loosely to describe impairment in general, separate from the specific legal terminology used once someone is actually charged.
What the Phrase Covers
It includes impairment from alcohol, illegal drugs, and even some prescription or over-the-counter medications, as covered in our guide to alcohol and drug impairment.
General Concept vs. Legal Charge
This article covers the general idea; see our guide to the specific legal charge and process for what actually happens once someone is charged.
Why the Distinction Is Worth Understanding
Understanding the general concept helps explain why the legal system treats impairment from multiple sources similarly, even though the specific substance involved may differ.