Psychedelic music includes various styles and genres that are influenced by a subculture of people who used psychedelic drugs. For example LSD, DMT, and mescaline, etc, which cause visual and auditory hallucinations and altered states of consciousness.
This music originated in the 1960s among the rock bands in the US and UK creating the genres of music like psychedelic folk, psychedelic rock, acid rock, and psychedelic pop before declining in the early 1970s. This was succeeded by progressive rock krautrock and heavy metal. this gave a way to revivals which included genres like acid house, trance music, and new rave.