This new scientific understanding of depression also offers a new way to think about the role of drugs in recovery. While antidepressants help brain cells recover their vigor and form new connections, Castren says that patients must still work to cement these connections in place, perhaps with therapy. He compares antidepressants with anabolic steroids, which increase muscle mass only when subjects also go to the gym.
“If you just sit on your couch, then steroids aren’t going to be very effective,” he says. “Antidepressants are the same way: if you want the drug to work for you, then you have to work for the drug.”