IMAX DOCUMENTARY: THE HISTORY OF LSD PART 2 OF 4
By the mid-sixties the backlash against the use of LSD and its perceived corrosive effects on the values of the Western middle class resulted in governmental action to restrict the availability of the drug by making any use of it illegal. Despite a history of positive results of judicious use under controlled circumstances, LSD was declared a "Schedule 1", even though this entails that the drug has a "high potential for abuse" and is without any "currently accepted medical use in treatment". LSD was removed from legal circulation. To support this action, the United States Drug Enforcement Agency claimed:
Although initial observations on the benefits of LSD were highly optimistic, empirical data developed subsequently proved less promising ... Its use in scientific research has been extensive and its use has been widespread. Although the study of LSD and other hallucinogens increased the awareness of how chemicals could affect the mind, its use in psychotherapy largely has been debunked. It produces no aphrodisiac effects, does not increase creativity, has no lasting positive effect in treating alcoholics or criminals, does not produce a 'model psychosis', and does not generate immediate personality change. However, drug studies have confirmed that the powerful hallucinogenic effects of this drug can produce profound adverse reactions, such as acute panic reactions, psychotic crises, and "flashbacks", especially in users ill-equipped to deal with such trauma.
They fail to mention that these "adverse reactions" are almost exclusively the result of a "psychedelic" dose, ~400μg or more (typical dose is around 50-150μg). The immediate environment and the psychological state of a person taking the substance can act as a catalyst for the mentioned negative experiences, as indeed with the positive.