Doctors don't know the causes of SAD, but heredity, age and your body's chemical makeup all seem to play a role. So can the availability of sunlight. Researchers suspect that reduced sunlight may disrupt circadian rhythms that regulate your body's internal clock, which lets you know when it's time to sleep and when it's time to wake up. This disruption may cause depression. For example, winter depression is more common in people living in more northern latitudes, such as in
Alaska, where the lengths of days and nights are more variable during the various seasons.
The best way is so called light therapy. Good friend of mine lived on Alaska almost 5 yrs. and he suffered from SAD and used the light therapy.
In severe cases, physicians may prescribe a selective serontonin reuptake inhibitor (SSRI)
antidepressant such as fluoxetine (Prozac), sertraline (Zaloft), or paroxetine (Paxil). SAD sufferers have also been prescribed trazodone (Desyrel). New antidepressant medications are constantly emerging on the market. Check with your physician on the appropriateness of medication use. There is detailed information on using anti-depressant medication for depression.
I suggest you the light therapy, cause it helped a lot to my friend.
Take care!
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