The book focuses on the prediction and optimization of pharmacological treatment of psychiatric patients. Topics covered include the importance of accurate psychiatric diagnosis, medical problems which can mimic psychiatric illness, and the interface between psychiatric illness and opiate addiction and alcoholism. Current literature on predicting responses to antidepressants, lithium, antipsychotics and antianxiety agents is summarized. This practical guide also offers details on the state-of-the-art uses of blood levels in psychiatric practice for each class of drugs as well as other useful information in tables, graphs and flow charts.