Antidepressant use nationally fell by 31 percent among adolescents between 2000 and 2010. Suicide attempts increased by almost 22 percent. JustinLing/Flickr hide caption

itoggle caption JustinLing/Flickr

Talk therapy is best for some people; antidepressants are better for others. Scientists say PET scans might help figure out early on what treatment a person needs. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Researchers tested the antidepressant Lexapro, or escitalopram generically, to see if it would protect the heart against mental stress. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images

Chris Stephens, 28, who has been battling depression all of his life, plays with his dogs at home in Concord, Calif., on Friday. After a dose of ketamine, Stephens says, "I actually wanted to do things. I wanted to live life." Lianne Milton for NPR hide caption

itoggle caption Lianne Milton for NPR

The antidepressant Prozac selectively targets the chemical serotonin. Paul S. Howell/Getty Images hide caption

itoggle caption Paul S. Howell/Getty Images