Chronic insomnia is one of the most common symptoms that individuals experience during a depressive episode. The existence of a causal link between insomnia and depression raises the intriguing question of whether effective management of insomnia could offer an opportunity to prevent the future emergence of depressive disorders.
Earlier studies have found cognitive behavioral therapy (CBT) an effective treatment for insomnia. A new clinical trial (Cognitive Behavioral Therapy for the Treatment of Depression-Related Insomnia), posted November 2005 on www.clinicaltrials.gov Web site, seeks to evaluate the effectiveness of CBT in treating insomnia symptoms that are secondary to depression. The researchers also will determine the long-term benefits of CBT and how repeat occurrences of insomnia are associated with the incidence of subsequent episodes of depression.