What is a common characteristic of hallucinogenic drug effects?

Hallucinogenic drugs are known for their ability to significantly alter a person's perceptions, mood, and cognitive processes. The key characteristic of these substances is that they can lead to distorted perceptions, which include changes in vision, hearing, and feeling of reality. Users may experience visual or auditory hallucinations, where they see or hear things that are not present, or their sense of time and space might be altered. This alteration can also influence their emotional responses and thoughts, contributing to a profound change in their overall experience of reality. Thus, the presence of distorted perceptions is a hallmark of hallucinogenic drug effects that sets them apart from other categories of drugs.