So the Adderall XR works but again only for a short period of time. The vyvanse worked better to suppress the ADD symptoms, however the crash was so much worse. I took the XR at 8am and again at 12pm. The XR was most effective 1-2pm. That is when the the two doses were actually mixed with each other. By 4pm I was crashing. Again the crash was much more bearable on Adderall. My guess is when I report this to my doctor next month I will have to take 3 a day in order to make it to bedtime. Hope this helps.