FILE &#8212; Medications, including Zoloft, an antidepressant, in Louisville, Ky., Aug. 14, 2014. About one in six American adults reported taking at least one psychiatric drug, usually an antidepressant or an anti-anxiety medication, and most had been doing so for a year or more, according to a new analysis. The report is based on 2013 government survey data on some 242 million adults. (Philip Scott Andrews/The New York Times)