Stephen M. Stahl is Adjunct Professor of Psychiatry at the University of San Diego, California, USA and Honorary Visiting Senior Fellow in Psychiatry at the University of Cambridge, Cambridge, UK. He has conducted various research projects awarded by the National Institute of Mental Health, the Veterans Administration and the pharmaceutical industry. Author of more than 350 articles and chapters, Dr Stahl is the author of the bestsellers Stahl's Essential Psychopharmacology and The Prescriber's Guide.