Seasonal affective disorder, or SAD, is a type of
depression that occurs during the same
season each year. You may have SAD if you felt depressed during the last two winters but felt much better in
spring and summer.
Antidepressants, especially when combined with talk therapy, generally help people recover from depression. Symptoms begin to improve within weeks for the majority of people taking antidepressants. And people who take antidepressants long-term -- up to 36 months -- have a relapse rate of only 18% compared to 40% for those who do not.
But if they work so well, why do so many people stop taking antidepressants within a few weeks of starting them? Or skip doses when they start to feel better?