Heart-related effects

Depending on your heart health and the type of antidepressant you take, you may need an electrocardiogram (ECG) before or periodically during treatment. The ECG is used to monitor what's called the QT interval to make sure it's not prolonged. A prolonged QT interval is a heart rhythm condition that can increase your risk of serious irregular heart rhythms (arrhythmias).

Certain antidepressants should not be used if you already have heart problems or if you're taking an MAOI. Talk with your doctor about your heart health and any heart medications or other medications that you take.