In order for a person to be classified as having major depressive disorder, he or she must experience a depressive episode that lasts at least
A) one week.
B) two weeks.
C) one month.
D) two months.
I think it would have to be 2 months, reason being I have depression and they told me to be classified as major, I'd have to have the side effects for at least 2 Months. Hope this Helps.