In June 1966, the House of Delegates of the American Medical Association took cognizance of the serious consequences of indiscriminate use of hallucinogens.
A resolution urging strict control and supervision of their production and administration included a warning that these drugs can produce uncontrollable violence, overwhelming panic... or attempted suicide or homicide, and can result, among the unstable or those with preexisting neurosis or psychosis, in severe illness demanding protracted stays in mental hospitals.5
There is no accurate measure of the number of persons who take hallucinogens. It is apparent, however, that in recent years their ranks have increased, especially among college students. Wide-spread publicity has been given to allegedly beneficial effects of lysergic acid diethylamide (LSD), and LSD cliques have sprung up throughout the country. Because of continued illicit manufacture and distribution of LSD in particular, physicians in urban communities and university towns can expect to encounter patients
Dependence on LSD and Other Hallucinogenic Drugs. JAMA. 1967;202(1):47-50. doi:10.1001/jama.1967.03130140105019