depression
"I felt much better on this medication, but found it had unfortunate side effect.  After ruling out the 2 other medicines I was on for other conditions, I found out it was the Pristiq that caused major photo-sensitivity. I basically had to stay out of the sun all last summer. I developed blotches and nausea after just a few minutes in the sun.  Being depressed and not being able to go outside doesn't work.  After weaning off it, the symptoms subsided.  Lively to be outside again, but now must try a different medicine."