Now in its thoroughly updated Second Edition , Dr. Ayd's highly acclaimed Lexicon is an indispensable desk reference for anyone working in psychiatry, neurology, or the underlying basic neurosciences. It provides succinct, detailed, and easily accessible definitions for the entire range of terms currently used in these fields, including drug categories, receptors, and the sites and mechanisms affected by pharmacologic treatments. This edition reflects the most recent developments in genetics and in psychopharmacology, including new drugs and current concepts on drug-drug interactions. Dr. Ayd has added over 1,000 new terms and rewritten nearly half of the entries in the original edition. From a review of the previous edition: "This book continues to be a standard reference that should be in the offices of colleagues in a wide range of clinical and research disciplines and on the desks of their students and trainees. It remains peerless !" Ross J. Baldessarini, MD, Professor of Psychiatry and Neuroscience,Harvard Medical School, Boston, MA, USA