Anxiety and depressive disorders are among the most common psychiatric problems encountered by mental health practitioners and often co-occur in some individuals. Approximately 40 million adults in the U.S. suffer from anxiety disorders, and mood disorders remain the most prevalent psychiatric condition, accounting for 25 percent of patients in psychiatric inpatient settings, 65 percent of psychiatric outpatients and as many as 10 percent of all patients seen in nonpsychiatric medical settings. Get a brief overview of the epidemiology and best-practice guidelines for treating major anxiety, depression and bipolar disorders, and discover the most common pharmacotherapies used in the treatment of these disorders.