Helping A Depressed Person Prozac is the most widely used antidepressant drug in the world.
Millions use it to combat depression.
Senior Writer Depression is the most serious psychiatric problem in the United State, mental health experts say. According to the U.S. Department of Health and Human Services, depression affects about 11 million people that is one in 20 people in America. But there is hope. Treatment for depression has come a long way in the last decade. Treatment for depression is a must, experts maintain.