Which of the following is a sign of substance intoxication or withdrawal as observed in a mental status exam?

• A. Odor of substance
• B. Memory loss
• C. Urinary incontinence
• D. Visual acuity impairment

Answer: (A)

The main idea here is recognizing observable signs of substance intoxication or withdrawal during a mental status exam. In the exam, you look for concrete cues that point to recent substance use or withdrawal, and the smell of alcohol or other substances on the breath or from the person is a classic, direct indicator. It instantly suggests involvement of a substance, which can explain changes in behavior, attention, or coordination.

Memory loss can occur for many reasons—head injury, delirium, dementia, or other cognitive issues—not specifically tied to intoxication or withdrawal. Urinary incontinence and visual acuity impairment are not typical, reliable signs of substance intoxication or withdrawal in the context of a mental status assessment, and they can arise from a variety of non-substance-related health problems.