I take Adderall XR. I've reported here before that when I go off this medication that I start having sleep issues again. This past week I again decided to go off it for a while. (why...I have no idea just wanted to give my system a break for a while and remember what it is like to be ADHD) Anyway, for the past 2 nights I've experience sleep disturbances. For whatever reason-- taking a stimulant helps me sleep at night.