Correspondence on "An algorithm for pharmacological treatment of mania during hospitalisation".

This is a letter to the editor on the article "An algorithm for pharmacological treatment of mania during hospitalisation" Dan Med J 2024;71(5):A08230525.

[Bipolar depression, a challenge diagnostic and treatmentwise].

This narrative review addresses the challenges of how to identify and treat bipolar depression. Bipolar depression, i.e.

[Light therapy for depression].

Artificial light has been used as a treatment for depression since the 1980s. The indications have since broadened from seasonal depression to non-seasonal depression including bipolar, geriatric, and chronic depression. Light acts through retinohypothalamic connections from specialised retinal neurons to central nuclei involved in circadian and emotional regulation.