Which behavior is a common indicator of someone using dissociative anesthetics?

Dissociative anesthetics, such as PCP and ketamine, alter a person’s perception and can lead to symptoms that affect motor function and perception of reality. A blank stare is a notable behavior associated with the use of these substances. When someone is under the influence of dissociative anesthetics, they may exhibit diminished responses to environmental stimuli, which can manifest as a lack of expressive facial activity and an inability to focus, resulting in a blank or vacant stare.

The other behaviors listed, while potentially observable in various contexts or under the influence of other substances, are not characteristic of dissociative anesthetic use. Rapid speech, loud laughter, and excessive hand movements are more commonly associated with stimulant use or other types of intoxication, rather than the dissociative state induced by these specific anesthetics. Understanding the distinctive effects of dissociative anesthetics helps in identifying their use accurately and in assessing the behavior of individuals who may be under their influence.