Whereas impulse-control disorders (ICDs) were once conceptualized as either addictive or compulsive behaviors, they are now classified within the DSM-IV-TR (American Psychiatric Association 2000) ICD category. These include intermittent explosive disorder (IED; failure to resist aggressive impulses), kleptomania (failure to resist urges to steal items), pyromania (failure to resist urges to set fires), pathological gambling (failure to resist urges to gamble), and trichotillomania (failure to resist urges to pull one's hair) (Table 19–1). However, behaviors characteristic of these disorders may be notable in individuals as symptoms of another mental disorder. If the symptoms progress to such a point that they occur in distinct, frequent episodes and begin to interfere with the person's normal functioning, they may then be classified as a distinct ICD.