Major depressive disorder is called by several names, including major depression, clinical depression, or unipolar depression. Depression is a disorder of the brain that leads to constant feelings of sadness, hopelessness, and low energy that are so strong that you have trouble with daily life for weeks at a time. It is estimated that 6.7 percent of adults in America have major depressive disorder, with women twice as likely as men to have this disorder. Read more in our patient education guide.
In major depressive disorder, depression symptoms last for 2 weeks or more and are severe enough to interfere with the ability to work, sleep, study, eat, and enjoy life. Symptoms may include:
Other common types of depression include:
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