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Course and Prognosis


Depressive symptoms typically develop over 2 or 3 weeks before the onset of a major depressive episode, during which time a person becomes anxious at the loss of concentration and energy. Untreated depressive episodes can last from 6 to 18 months, but average is about 8 months. Treated episodes typically last from 6 weeks to 3 months. In treated depression episodes tend to return prematurely when antidepressants are not taken for the full indication.

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