Antidepressant drugs may protect brain from damage due to depression
Studying women with histories of clinical depression, researchers have found that the use of antidepressant drugs appears to protect a key brain structure often damaged by depression. Previous research has shown that a region of the brain involved in learning and memory, called the hippocampus, is smaller in people who have been clinically depressed than in those who never have suffered a depressive episode. Now, researchers have found that this region is not quite as small in depressed patients who have taken antidepressant drugs.
(That’s just a summary, there’s much more at the linked site.)