Sleep and depression: non-drug time-based treatments for unipolar depression

Bright light therapy (BLT) shows promising results for treating unipolar depression, particularly when combined with antidepressant medications.

• Many patients with depression do not respond to standard antidepressant medications.
• There is significant overlap between sleep and circadian issues and depression.
• BLT may be beneficial as an additional treatment in specific populations, such as older adults and during pregnancy.
• Combination treatments involving various chronotherapies show potential but lack strong empirical support.
• Further exploration of combined chronotherapeutic approaches for depression is warranted.

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