seasonal affective disorder (SAD)

“The diagnosis of Seasonal Affective Disorder (SAD) should be considered in all patients presenting with nonspecific complaints such as lethargy and fatigue, especially during the fall and winter months. The diagnosis is based on a patient's history; special investigations are invariably uninformative.”

“Treatment with bright environmental light is generally a first-line therapeutic approach, but other treatments including anti-depressants, stress management exercise, and psychotherapy may be useful too. Neither the ethology if SAD nor the mechanism of the antidepressant effects of light are well understood, and both areas are the focus of ongoing research.”

—Dr. Norman Rosenthal
Unit for Biological Psychiatry, National Institute of Mental Health

To view light therapy products currently used to treat SAD, visit Apollo Light

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