“ Concerning all acts of initiative (and creation) there is one elementary truth, the ignorance of which kills countless ideas and splendid plans - that the moment one definitely commits oneself, then providence moves too ... Whatever you can do, or dream you can, begin it. Boldness has genius, magic and power in it. Begin it now! ” - Goethe

Other anxiety disorders include Anxiety Disorders due to a General Medical Condition (where the anxiety is a direct physiological consequence of a general medical condition), Substance-Induced Anxiety Disorder (where the anxiety is directly caused by the physiological effects of a substance - drug of abuse or medication - including prescription use, poisoning, intoxication, or withdrawal), and Anxiety Disorder Not Otherwise Specified (where there is prominent clinically significant anxiety or phobic avoidance that doesn't meet the diagnostic criteria for any other anxiety or adjustment disorder).

Health anxiety disorder and hypochondriasis are typically classified under Somatoform disorders.