Responding to danger is the most basic of human survival skills. People with anxiety disorders have fears that occur out of proportion to any realistic danger. Their fear mechanism is over sensitive. Twelve percent of the general population in any given year will experience an anxiety disorder (Frances, & First, 1998). Anxiety disorders include panic disorder, generalized anxiety disorder, phobias, obsessive/compulsive disorder, social anxiety, and post-traumatic stress disorder. The two most common anxiety disorders in people who have experienced addiction are panic disorder and generalized anxiety disorder.