Almost everyone has had a bout with depression. It's nothing to be ashamed about. It can be triggered by stress, personal problems, extreme sadness, exposure to some types of drugs, some genetic predisposition, etc. There are different types and levels of depression but evidence from neuroscience, genetics and clinical research suggests that depression is a disorder of the brain. The good news is it can be treated--if properly diagnosed and managed. There are two general types of treatment: 1) medicine and 2) therapy. Personally I can see that meditation can play a part to reduce stress or sadness, which can lead to depression. But once the patients have already developed severity of symptoms, they need both treatments to feel better. "Talk therapy" with a professional can help them understand the nature of the disease and make them cope better while the medicine intervenes in a physiological way.