I was taking 60 mg of adderall when my doctor switched me to strattera. The adderall made little difference in my thinking. I have been falling asleep at odd times. I even missed the first three runs of the Red Sox/Cardinals last game. That is a sin in my book. I have always had trouble sleeping at night, so I wouldn't notice if the strattera was affecting my sleep. I started on the 40 mg today. We shall see.... One thing I would like to know is does it take time for this med to work or should it help right away if it will help at all.