Systematic review of depression in patients with multiple sclerosis and its relationship to interferonβ treatment

The reviewed studies conclude that there is not a clear relationship between IFNβ and depression. A history of depression is a risk factor for developing depression during the first 6 months of treatment, nevertheless, it is not sufficient to contraindicate it. The development of new strategies is crucial for early detection of depressive symptoms. An adequate treatment can both improve the mood and deal with the neurological disease by increasing treatment adherence and interfering with inflammation. Chronic destructive brain changes and serotonergic depletion due to inflammatory factors have been proposed as the underlying cause of depression in these patients. It is suggested that these patients would have fewer functional reserve remaining to deal with stressful life events, which could precipitate a depressive disorder.