Panic disorder is characterized by repeated and unpredictable attacks of intense fear and anxiety. Agoraphobia, literally "fear of the marketplace", develops from a panic disorder in more than one-third of cases.
Timothy Rogge, MD, Medical Director, Family Medical Psychiatry Center, Kirkland, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.