This new addition to the LWW Handbook Series is a practical quick-reference guide to evaluating and treating patients with psychiatric illnesses and concomitant substance use disorders. The author explains how drugs of abuse affect the course of schizophrenia, bipolar disorder, depression, and anxiety disorders and offers advice on treatment of each illness in the presence of continued substance abuse. Also included are pointers for dealing with common problems such as noncompliance and withdrawal. The book is replete with treatment algorithms and case vignettes. Tables show how various drugs of abuse affect the symptoms of each psychiatric illness and interact with medications used to treat each illness.