In the time of the 1960s and '70s counterculture, lysergic acid diethylamide, commonly known as LSD, was a popular hallucinogenic drug. Though eventually made illegal, LSD was first used in government and psychotherapeutic experiments conducted to pinpoint a clinical use for the drug. These experiments were abandoned due to the unpredictability of people's reactions to LSD 'trips' and the dangerous psychological effects that an unpredictable bad trip can have on a person. "LSD" gives a brief overview of how hallucinogens work in the brain and explains their traditional use in spiritual contexts. Looking at the psychological, biological, social, and legal aspects of this psychedelic drug, this informative new title explains the chemistry of the drug, dispels common misconceptions, and highlights the very real risks of hallucinogenic drugs.Chapters include: Overview of Hallucinogens; History of LSD; Government Testing of LSD; Psychological and Physiological Effects of LSD; LSD-Induced Psychological Disorders; Use of LSD in Psychotherapy; and Comparison of LSD to Other Hallucinogens.