How does Lithium work?

Lithium works by changing the activity of the nerves that contain certain chemicals in the brain.  If taken regularly, Lithium can stop or reduce the number of manic episodes.

A more in depth explanation of how Lithium works can be found by clicking this link!  http://abcnews.go.com/Health/BipolarTreatment/story?id=4395984

James Potash is a doctor that specializes in mood disorders.  In the video below, he explains the action a little more in depth.