I WAS PRECRIBED ADERRAL 90MG PER DAY UNTIL I WAS 28, BUT I DIDN T LIKE THE SIDE EFFECTS OR FEELINGS WHEN I DIDN T TAKE IT. HOWEVER, SINCE BEING OFF, IT HAS BEEN VERY DIFFICULT FOCUSING ON DAILY WORK, PERSONAL TASKS, AND EVEN SLEEPING FOR CRYING OUT LOUD. I VE HEARD VIVANSE IS A BETTER OPTION, PLEASE ADVISE