Insomnia is a common yet often unrecognized symptom in patients with depression and anxiety. Because of its association with functional impairment, medical conditions, and disturbances in multiple body systems, insomnia must be included in the treatment of depression and anxiety disorders. If left untreated, insomnia may increase the risk of episode recurrence, severe illness course, and poor treatment response. However, these risks may be diminished with effective insomnia treatment.
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