Rates of depression increase during adolescence and may put youth at risk for suicidality, future episodes, and impaired functioning in multiple life domains. Increased vulnerability for depression during this stage may occur because it is when the cognitive capacity for personal reflection, abstract reasoning, and formal operational thought develop; depressive styles for attributing events may hence form, along with hopelessness about the future. However, other biological and social influences may also interact with the increased cognitive vulnerability. Latino ethnicity and female gender appear to exert particular influence. Treatment for adolescent depression includes medication (mainly Prozac and Zoloft), cognitive-behavioral therapy, interpersonal therapy, and family therapy. Medication and psychosocial treatment is also combined, particularly for treatment-resistant depression.