Antidepressant medication is the most commonly prescribed treatment for people with depression. They are also commonly prescribed for other conditions, including bipolar depression, post-traumatic stress disorder, obsessive-compulsive disorder, chronic pain syndromes, substance abuse and anxiety and eating disorders. According to a 2011 report released by the US Centers for Disease Control and Prevention, about one out of every ten people (11%) over the age of 12 in the US is on antidepressant medications. Between 2005 and 2008, antidepressants were the third most common type of prescription drug taken by people of all ages, and they were the most frequently used medication by people between the ages of 18 and 44. In other words, millions of people are prescribed antidepressants and are affected by them each year.