This document summarizes mood disorders including major depressive disorder, bipolar disorder, dysthymic disorder, and cyclothymic disorder. It discusses the symptoms, diagnostic criteria, prevalence, etiology, treatment goals, and pharmacotherapy options for these conditions. Key points include that major depressive disorder is more prevalent in women while bipolar disorder is equal between men and women; biological and psychosocial factors can contribute to the development of mood disorders; and treatment may involve hospitalization, psychotherapy, cognitive behavioral therapy, and medications like SSRIs, SNRIs, lithium, and antipsychotics depending on the specific diagnosis.