Researchers from Cardiff University may have determined why lithium -- commonly prescribed for bipolar disorder for more than 50 years -- is an effective treatment for the psychiatric illness.

A new study suggests veterans with any psychiatric illness face an increased risk of suicide and those with bipolar disorder are at an even greater risk.

An intravenous dose of ketamine, an anesthetic, may curb depression symptoms within 40 minutes in patients with treatment-resistant bipolar disorder.

Bipolar disorder does not increase the risk of committing violent crime in affected individuals, according to a new study from Sweden's Karolinska Institutet.