Similar term(s): psycedelic, dissociative, deliriant.
Hallucinogens are chemical agents that induce alterations in perception,
thinking, and feeling. Examples include LSD and PCP.
Effects are noted within 20-30 minutes of ingestion and include dilatation of
the pupils, blood pressure elevation, abnormally rapid heart rate, involuntary
trembling or quivering, overactive reflexes, and the psychedelic phase
(consisting of euphoria or mixed mood changes, visual illusions and altered
perceptions, a blurring of boundaries between self and non-self, and often a
feeling of unity with the cosmos).
In addition to persistent or recurrent hallucinations that are regularly
produced, adverse effects of hallucinogens are frequent and include bad trips,
post-hallucinogen perception disorder or flashbacks, delusional disorder (the
individual becomes convinced that the perceptual distortions experienced
correspond with reality), and affective or mood disorder, which consist of
anxiety, depression, or mania (typically, the individual feels that he or she
can never be normal again and expresses concern about brain damage as a result
of taking the drug).
Source: GreenFacts, based on WHO
Lexicon of alcohol and drug terms
Hallucinogens make up one of four major groups of psychoactive drugs, next to
depressants, stimulants, and opioids.
Source: GreenFacts Digest on
Alcohol - Hallucinogen - Nervous system - Opioids - Stimulants
To read about this term in context:
GreenFacts Summary on Psychoactive Drugs Tobacco, Alcohol, and Illicit Substances: