“More Than Medical Significance”: LSD and American Psychiatry—1953 to 1966 Journal of Psychoactive Drugs 1987 John R. Neill 18 citations (1987). “More Than Medical Significance”: LSD and American Psychiatry—1953 to 1966. Journal of Psychoactive Drugs: Vol. 19, No. 1, pp. 39-45. DOI: 10.1080/02791072.1987.10472378 (opens in new tab) Lysergic acid diethylamide Hallucinogen