I have been on Vyvanse for around a year an a half. I was prescribed it for fatigue and concentration as it was very difficult for me to stay awake during the day. My p doc also gave me a script for adderall if I wake up late or only need energy for part of the day (Vy. is supposed to work 12 hrs, Ad. is only 6hrs). Have not experienced much as far as side effects go. They were worried about appetite suppression bc of my eating disorder history but it never really became a problem. Can't speak to its aiding impulses as that was not something I have ever sought help for but it is worth a shot to try it.