Major depressive disorder (MDD), commonly called major depression, unipolar depression, or clinical depression, wherein a person has one or more major depressive episodes. In major depressive disorder the person exhibit more symptoms than are required for dysthymia and the symptoms are more persistent (not interwoven with periods of normal mood). Psychiatrist and clinicians have recognize several subtypes of major depressive disorders. There are different types of treatments available for mood disorders, such as therapy and medications. Behaviour therapy, cognitive behaviour therapy and interpersonal therapy have all shown to potentially beneficial in depression. Major depressive disorder medications usually include antidepressants, while bipolar disorder medications can consist of antipsychotics, mood stabilizers and or lithium.