In DSM-IV, a group of mood disorders that includes major depressive disorder (single episode or recurrent); dysthymic disorder; and depressive disorder not otherwise specified (NOS).

  • major depressive disorder (in other classificatory systems called major depression; manic depressive disorder, depressed) occurs in a person who has never had an episode of mania and is characterized by significant lowering of the mood tone and loss of interest or pleasure in daily activities, plus a range of other symptoms that may include significant weight and appetite changes, insomnia or hypersomnia, psychomotor agitation or retardation, fatigue or loss of energy, feelings of worthlessness or excessive and inappropriate guilt, diminished ability to think or concentrate, indecisiveness, and recurrent thoughts of death or suicide. Some patients have only a single episode, whereas others have recurrent episodes of depression.
     
  • depressive disorder not otherwise specified (NOS) includes premenstrual dysphoric disorder and postpsychotic depression of schizophrenia.











   

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