Trials of Psychedelic Therapy:: LSD Psychotherapy in AmericaAfter LSD arrived in the United States in 1949, the drug's therapeutic promise quickly captured the interests of psychiatrists. In the decade that followed, modern psychopharmacology was born and research into the drug's perceptual and psychological effects boomed. By the early 1960s, psychiatrists focused on a particularly promising treatment known as psychedelic therapy: a single, carefully guided, high dose LSD session coupled with brief but