LSD - lysergic acid diethylamide - is an evocative acronym: it strikes a rational fear into governments and an irrational one into the media. Those who have taken the drug are in awe of its transformative power; to those who have not, it is a dangerous unknown. Since LSD was invented by Swiss chemist Albert Hofmann, who referred to it as his "problem child", it has been a drug in search of a use. LSD is now inching its way back onto research agendas in the United States and Europe.
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