Depression, even the most severe cases, is a highly treatable disorder. As with many illnesses, the earlier that treatment can begin, the more effective it is and the greater the likelihood that recurrence can be prevented.
Appropriate treatment for depression starts with a physical examination by a physician. Certain medications, as well as some medical conditions such as viral infections or a thyroid disorder, can cause the same symptoms as depression and should be ruled out. The doctor should ask about alcohol and drug use, and whether the patient has thoughts about death or suicide.