Psychedelics are a subclass of hallucinogenic drugs whose primary effect is to trigger non-ordinary mental states and an apparent expansion of consciousness. Also referred to as classic hallucinogens or serotonergic hallucinogens, the term psychedelic is sometimes used more broadly to include various types of hallucinogens, such as those which are atypical or adjacent to psychedelia like salvia and MDMA, respectively.
Synthetic mescaline, the first psychedelic compound to be extracted and isolated
5-HT2A receptor
Doses of lysergic acid diethylamide (LSD)
Free base N,N-DMT extracted from Mimosa hostilis root bark (left); vape cartridge made with freebase N,N-DMT extract (right)
Hallucinogens are a large and diverse class of psychoactive drugs that can produce altered states of consciousness characterized by major alterations in thought, mood, and perception as well as other changes. Most hallucinogens can be categorized as either being psychedelics, dissociatives, or deliriants.
One "Blotter" sheet of 900 LSD doses
Salvia divinorum
Datura innoxia in flower
Attractive but highly toxic berry of Atropa belladonna