Which category of drugs is characterized as "mind-altering" substances?

Hallucinogens are categorized as "mind-altering" substances because they significantly affect perception, thought, and mood, often leading to altered states of consciousness. These drugs can induce sensory distortions, changes in the perception of time, and vivid hallucinations, which can profoundly influence an individual's mental state and experiences. Examples of hallucinogens include substances like LSD and psilocybin (found in certain mushrooms).

Stimulants primarily increase alertness and energy, while depressants primarily calm or relax the user, and narcotics tend to relieve pain and induce sleep. Though these other categories of drugs can also affect the mind and body, hallucinogens are specifically defined by their ability to alter reality and perception in such a pronounced way.