What behavior might indicate hallucinogen influence?

Hallucinogens primarily affect perception, mood, and cognitive processes, leading to various psychological reactions. Paranoia is a common response to hallucinogen use, as individuals may experience altered reality, resulting in feelings of fear or mistrust toward their environment or others. This state of heightened anxiety can stem from the distorted perceptions that hallucinogens induce, leading individuals to feel threatened or unsafe even when they are not.

In contrast, panic attacks, excessive laughter, and sleepiness can be related to other conditions or substances, and while they could potentially accompany hallucinogen use, they are not as directly associated with its core effects as paranoia is. Individuals under the influence of hallucinogens may experience a distorted perception of reality that can manifest as paranoia, making it a clear indicator of hallucinogen influence.