This resource was created by SMI Adviser content partners and approved by the SMI Adviser clinical expert team for inclusion in the knowledge base.
Major depressive disorder is much more than feeling sad or having a bad day. It is a serious mental illness (SMI) that requires understanding, compassion and medical care. It can present different symptoms in different people. Yet for most people, a depressive disorder changes how they function day-to-day.
View this fact sheet to learn more about the symptoms of and treatment options for major depressive disorder.