"i&#039;ve been on vyvanse for about 2 months now and i&#039;ve seen a huge improvement in my motivation to do thinks and want to do school work. my grades were really bad before i took vyvanse but now they are excellent. the only downfall to this is i have lost about 20 pounds and it seems like i&#039;m always nervous so i guess i&#039;m going to stop this medicine so i can gain the weight back on."