. Antidepressant medicines may increase suicidal thoughts or actions in some children,
teenagers, and young adults when the medicine is first started.
2. Depression and other serious mental illnesses are the most important causes of suicidal
thoughts and actions. Some people may have a particularly high risk of having suicidal
thoughts or actions. These include people who have (or have a family history of) bipolar illness
(also called manic-depressive illness) or suicidal thoughts or actions.