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Seasonal Affective Disorder: Common Questions and Answers.

Samuel V Galima¹, Stephen R Vogel², Adam W Kowalski³

¹Fort Sill, OK, USA.

American Family Physician

|November 30, 2020

Summary

This summary is machine-generated.

Seasonal affective disorder (SAD) involves recurring depressive episodes tied to specific seasons. Effective treatments include light therapy, antidepressants, and cognitive behavioral therapy, with bupropion showing promise for long-term management.

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Area of Science:

Psychiatry
Mood Disorders
Seasonal Affective Disorder

Background:

Seasonal affective disorder (SAD) is a subtype of major depressive or bipolar disorder.
Characterized by cyclical mood changes linked to seasons, typically with winter onset and summer remission.
Risk factors include genetics, female sex, northern latitude, and young adulthood.

Purpose of the Study:

To outline the diagnostic criteria for SAD.
To review current and emerging therapeutic interventions for SAD.
To discuss long-term management strategies for recurrent SAD.

Main Methods:

Diagnosis requires seasonal episodes with full remission outside the season for two consecutive years.
First-line treatments include light therapy (2,500–10,000 lux for 30–60 min daily), antidepressants, and cognitive behavioral therapy.
Lifestyle interventions like exercise and natural light exposure are recommended.

Main Results:

Light therapy devices and dawn simulators are commercially available.
Bupropion demonstrates strong evidence for long-term preventive intervention in recurrent SAD.
Evidence for long-term psychotherapy and vitamin D supplementation remains inconclusive.

Conclusions:

SAD diagnosis hinges on seasonal symptom patterns and remission.
A combination of therapies, including light therapy and pharmacotherapy, is standard for acute and long-term SAD management.
Further research is needed to clarify the efficacy of certain interventions like vitamin D for SAD.