Bipolar II disorder
Hypomanic episodes and major depressive episodes; no full mania or psychosis.
How it presents
hypomania: elevated mood, increased energy, decreased need for sleep ≥4 days, no marked impairment/psychosis; plus ≥1 major depressive episode
Tell it apart from
- Bipolar I disorder
- Major depressive disorder (recurrent)
Treatment reasoning
Mood stabilizers (lithium, lamotrigine for depression), CBT-IPSRT; antidepressants only with mood-stabilizer coverage due to switch risk.