Used primarily in the treatment of bipolar disorder, it helps stabilize mood swings and manage symptoms of mania and depression. It is often prescribed as a maintenance therapy to prevent relapse. Additionally, it has shown efficacy in reducing the risk of suicidal behavior in patients with mood disorders. Its application extends to certain cases of cluster headaches and as an adjunct in treating schizoaffective disorder. Regular monitoring of blood levels is essential to ensure therapeutic efficacy and minimize potential side effects.