LSD has a controversial and extraordinary reputation, due to the special effects it can induce on human consciousness. Its experimental use lead to some groundbreaking discoveries about the brain and the deeper layers of the human psyche. After its application in neuroscience, and as a tool within psychotherapy, it was increasingly used by laymen for producing euphoria and religious experiences. Today, there is a resurgence of interest in LSD, including its possible uses in psychotherapy and for the treatment of some headache disorders. This book represents the first ever comprehensive review of the psychological and pharmacological effects of LSD. It draws on data from more than 3000 experimental and clinical studies. The Pharmacology of LSD provides a unique and valuable resource for anyone interested in better understanding this controversial hallucinogenic drug - including brain scientists, psychopharmacologists, addiction researchers, and psychiatrists.