"vyvanse is a wonderfully great med. for about the first month you take it. i&#039;m on 70 mg and have been for a little over a year. it worked just as i wanted it to but the started to wear off and now i only feel the affect for about 3 hours then i get angry really fast. also if i forget to take my morning doseage i just feel like i&#039;m dying all day so i rate it 7/10"