Seasonal Affective Disorder

  title={Seasonal Affective Disorder},
  author={Timo Partonen and Jouko L{\"o}nnqvist},
  journal={CNS Drugs},
SummarySeasonal affective disorder (SAD) is characterised by recurrent depressive episodes, occurring typically in winter (i.e. winter SAD). The atypical symptoms of depression frequently precede the onset of each episode and are closely associated with the recurrence of the episodes. Winter depressive episodes are mostly of mild to moderate severity. Patients with winter SAD seldom require hospitalisation, have psychotic symptoms or are at risk of suicide. However, most patients do experience… 

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