These are the top 25 psychiatric medications by number of U.S. prescriptions dispensed in 2013, according to IMS Health, a global information and technology services company. I’ve also provided their 2011, 2009, and 2005 rankings.

To put the percent changes below into perspective, the U.S. total population rose approximately 1.5 percent from 2011 to 2013. That suggests that anything above a 1.5 percent change was driven by other factors — more people seeking treatment, more awareness and acceptance of seeking treatment for a mental illness, more pharmaceutical advertising and marketing, or some other factor.