Driver's License Test Prep
Oregon Practice DUI & Impaired Driving

You took a prescribed medication in Oregon and feel groggy. Which statement about Oregon's DUII law is correct?

  1. A.
    DUII charges apply only to alcohol and illegal drugs.
  2. B.
    DUII applies to any impairing substance, including medications. Correct
  3. C.
    DUII applies only if the medication is a controlled substance.
  4. D.
    DUII requires a BAC of 0.08% or higher.
The Why

The answer is "DUII applies to any impairing substance, including medications."

Oregon's DUII law applies to any substance that impairs your mental or physical ability to drive, including over-the-counter and prescription medications. The trigger is impairment, not the substance's legal status. If you are not sure whether it is safe to drive after taking a new medication, ask your doctor or pharmacist about side effects, or find different transportation.

Why the others miss

The traps in the wrong answers

A. DUII charges apply only to alcohol and illegal drugs.

Oregon's DUII law covers any impairing substance, including over-the-counter and prescription medications. Misreading: Reads DUII as substance-specific to alcohol and illegal drugs; the manual extends it to any impairing substance.

C. DUII applies only if the medication is a controlled substance.

Schedule designation does not determine DUII liability; impairment does. Misreading: Confuses controlled-substance scheduling with impairment liability; the manual makes impairment the trigger, regardless of the substance's legal classification.

D. DUII requires a BAC of 0.08% or higher.

The manual says you can be arrested for DUII even with a BAC below 0.08%, and DUII applies to non-alcohol impairment without any BAC component. Misreading: Treats 0.08% BAC as a required threshold; the manual says drivers can be arrested for DUII even when BAC is lower or no alcohol is involved.

The Rule

This question tests your knowledge of DUI & Impaired Driving in Oregon. Source: Oregon Driver Manual, "Impaired Driving," p.83..

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