Anxiety disorders is one of the most prevalent categories of psychopathology in children and adolescents. These revised practice parameters highlight the DSM-IV changes for anxiety disorders and review the literature related to the assessment and treatment of anxiety disorders in children and adolescents. Up-to-date information on longitudinal outcome data, assessment of anxiety, parent-child interventions, and use of selective serotonin reuptake inhibitors has been added to the previous parameters, published in September 1993. Recommendations for evaluation and multimodal approaches to treatment are presented.