What behavioral signs may occur with stimulant use?

The option that identifies euphoria, irritability, and hyperactivity as behavioral signs associated with stimulant use accurately reflects the stimulating effects of these substances on the central nervous system. Stimulants, such as amphetamines and cocaine, typically enhance dopamine release in the brain, leading to feelings of euphoria or an intense sense of well-being.

Irritability can also occur as a result of the overstimulation of the nervous system or as a withdrawal symptom when the effects of the stimulant wear off. Hyperactivity is another common hallmark of stimulant use, as individuals may exhibit increased energy levels and an inability to sit still or concentrate on one task.

In contrast, other options depict symptoms more commonly associated with the use of depressants or indicate behavioral and physical conditions unrelated to stimulant use. Acute fatigue and poor coordination, as well as chronic stress and constant worry, do not align with the typical effects of stimulants, which tend to energize rather than exhaust. The mention of nausea and increased sleep is also inconsistent with stimulant characteristics, as these substances usually suppress appetite and can lead to insomnia rather than increased sleep.