Dr L: The market for Psychiatric Drugs has boomed in the last 30 years and generated a great deal of wealth for many. However this lucrative enterprise has depended on the telling of a false story to the American Public. Can you explain? Robert Whitaker: After the APA published the third edition of its Diagnostic and Statistical Manual in 1980, the psychiatric profession began regularly telling of how great advances were being made in understanding the biological causes of mental disorders. Soon we began to hear that they were known to be due to chemical imbalances in the brain, and that psychiatric medications—like Prozac and other SSRIs—corrected those imbalances, and thus were like “insulin for diabetes.” But if you look into the research, you find that in fact the researchers failed to find that simple chemical imbalances were the cause of mental disorders.