The condition and the treatment
A major depressive episode is a period of symptoms of major depressive disorder. These symptoms include severe feelings of sadness, despair, hopelessness, and guilt or low self‑worth, as well as tiredness, lack of interest in life and difficulty concentrating. People having a major depressive episode may be unable to eat or sleep, or to take part in social activities, may become completely withdrawn and may have suicidal thoughts or attempt suicide. The episodes can last from weeks to years, and can recur.
Vortioxetine (Brintellix) is an antidepressant that treats the symptoms of depression. It is thought to work by increasing levels of a chemical called serotonin in the brain.
NHS Choices may be a good place to find out more.