"The term 'hallucinogen' is widely used and understood in both professional and lay circles, in spite of the fact that hallucinations in the strict psychiatric sense of the word are a relatively rare effect of these drugs (Hollister 1962). What is probably the first reference to hallucinations as produced by peyote appears in Louis Lewin’s book published in 1924 in German and later translated into English with the nearly identical title Phantastica (Lewin 1924, 1964). In this book by the noted German toxicologist, the term 'hallucinatoria' appears as a synonym for phantastica to designate the class of drugs that can produce transitory visionary states 'without any physical inconvenience for a certain time in persons of perfectly normal mentality who are partly or fully conscious of the action of the drug' (Lewin 1964, p. 92). Lewin lists peyotl (also spelled 'peyote') (Anhalonium lewinii), Indian hemp (Cannabis indica), fly agaric (Agaricus muscarius), thornapple (Datura stramonium), and the South American yahe (also spelled 'yage') (Banisteria caapi) as representatives of this class."
Szára, Stephen, "Are Hallucinogens Psychoheuristic," National Institute on Drug Abuse Research Monograph Series (Rockville, MD: U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, 1994) NIDA Research Monograph 146, p. 34.