It's only been tested for Bipolar depression which is different from regular and sufferers usually aren't given meds for the depression, only the mania because depression meds often cause bipolars to swing over into mania.

There's serious experiments that have been done as the Journal of Psychiatry article references.

http://www.mclean.harvard.edu/resear...maryepmrsi.php

http://www.goldcoastdbsa.com/research/mri.php