What is a common characteristic of hallucinogens and psychedelics?

Hallucinogens and psychedelics are recognized for their ability to significantly alter an individual's perception of reality. This characteristic encompasses a range of sensory distortions, altered thought processes, changes in mood, and an altered sense of time and space. The substances alter neural pathways in the brain, leading to experiences that can include visual and auditory hallucinations, as well as profound introspective insights.

This alteration in perception is central to their classification as hallucinogens and psychedelics, setting them apart from other classes of drugs that may induce sleep, suppress appetite, or have addictive properties. While some substances may have components that affect sleep or appetite, the defining and predominant effect of hallucinogens and psychedelics is their profound impact on how reality is experienced by the user. This understanding is crucial when studying the effects and classifications of different psychoactive substances.