An anxiety disorder is different from occasional feelings of anxiety; people with the disorder often feel overwhelmed with excessive, irrational fear and dread. They may be tormented by nightmares, panic attacks, or obsessive thoughts. There are several types of anxiety disorders, including post-traumatic stress disorder, panic disorder, and agoraphobia. Psychotherapy and medications, such as benzodiazepines and beta-blockers, are commonly used for treating various anxiety disorders.