I was given a starter kit from my psych. and I was to take 25 mg for 1 week then 50 mg for 2 weeks and the very first day I took the 25 mg. I was surprised to not sleep hardly any that night and a very overwhelming anxious feeling(which by the way is why I was prescribed it to begin with) but I kept taking it for a couple more days hoping that the side effects would go away but they didn't so i am now being prescribed lexapro, hope it works.