The Importance of Treating Insomnia in Psychiatric Illness

Insomnia rates continue to rise in the setting of the pandemic,¹ contributing to increasing rates of depression and anxiety, as well as worsening symptoms of other severe mental illnesses. Data suggests this symptom, defined as chronic sleep onset and/or sleep continuity problems associated with impaired daytime functioning, is common in psychiatric illnesses, and can worsen their course.²

The incidence of psychiatric illness in patients with insomnia is estimated at near 50%, with the highest rates found in mood disorders such as depression and bipolar disorder, as well as anxiety disorders.³ In patients with diagnosed major depressive disorder, insomnia rates can approach 90%.^4-6

Insomnia has been identified as a risk factor for development of mental illness, including doubling the risk of major depressive disorder and tripling the risk of any depressive or anxiety disorder.^7,8 It can also significantly increase the risk of alcohol abuse and psychosis.⁸

Sleep disturbances can worsen symptoms of diagnosed mental illness, including substance abuse, mood and psychotic disorders.^9-10 In one study, nearly 75% of patients with a diagnosis of schizophrenia or bipolar spectrum disorder had at least one type of sleep disturbance (insomnia, hypersomnia, or delayed sleep phase).¹⁰This was almost twice the rate in healthy controls.