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Hallucinogen
A hallucinogen is one of a class of drugs that results in profound alterations in sensory and perceptual experiences. In some cases, users experience vivid visual hallucinations. It is also common for these types of drugs to cause hallucinations of body sensations (e.g., feeling as if you are a giant) and a skewed perception of the passage of time.
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Diagram of psychoactive drugs
Stimulants
Cannabinoids
Empathogens
Psychedelics
Dissociatives
Hallucinogens
Psychologically Addictive Psychoactive Drugs
Depressants (Sedative-Hypnotics)
Psychoactive Drugs' Interaction with Neurotransmitter Systems
Endogenous Opioid System
National Institute on Drug Abuse (NIDA) Resources
An individual is observed to have constricted pupils, slurred speech, and a significantly slowed breathing rate. They appear drowsy and disoriented. This specific combination of physiological and behavioral effects is most characteristic of which class of psychoactive substances?
Opioid Drugs
Hallucinogen