| Major Depressive Disorder |
|---|
| • Loss of interest or pleasure in almost all activities • Despondent mood; feelings of emptiness, worthlessness, or excessive guilt • Preoccupation with death or suicidal thoughts • Difficulty sleeping or excessive sleeping • Diminished ability to think, concentrate, or make decisions • Diminished appetite and significant weight loss |
| Persistent Depressive Disorder |
| • Chronic depressed feelings that are often less severe than those that accompany major depressive disorder |
| Seasonal Affective Disorder (SAD) |
| • Recurring episodes of depression that follow a seasonal pattern, typically occurring in the fall and winter months and subsiding in the spring and summer months |
| Bipolar Disorder |
| • One or more manic episodes characterized by euphoria, high energy, grandiose ideas, flight of ideas, inappropriate self-confidence, and decreased need for sleep • Usually one or more major depressive episodes • In some cases, may rapidly alternate between symptoms of mania and major depressive disorder |
| Cyclothymic Disorder |
| • Moderate, recurring mood swings that are not severe enough to qualify as major depressive disorder or bipolar disorder |