May 9, 2011
Even people who show a positive response to antidepressant medications still experience symptoms of depression.
University of Texas researchers analyzed data from the largest study on the treatment of depression.
They tracked symptoms such as sadness, suicidal thoughts , changes in sleep patterns, energy levels and concentration.
The team discovered every respondent in their study experienced at least three residual symptoms while on antidepressants.
75% reported they still felt five or more symptoms.
Study authors say the next step is to develop more targeted antidepressant therapies and to better understand the association between depression and concentration.