Which disorder is characterized by hypomania and dysthymia lasting more than 2 years?

The disorder characterized by hypomania and dysthymia lasting more than 2 years is Cyclothymic Disorder. This condition features periods of hypomanic symptoms that are present for at least half of the time over a two-year period, coupled with periods of depressive symptoms that do not meet the full criteria for a major depressive episode.

Individuals with Cyclothymic Disorder experience a chronic fluctuation between these mild hypomanic and depressive symptoms, but the mood changes are less severe than those in Bipolar I or Bipolar II disorders. Notably, the duration of symptoms—lasting for at least two years—is a key aspect of Cyclothymic Disorder, distinguishing it from other mood disorders that have different criteria regarding the duration and severity of mood symptoms.

This chronic nature of the symptoms is a central feature, leading to significant distress or impairment, and it highlights the importance of distinguishing Cyclothymic Disorder from other forms of hypomanic or depressive disorders.