"i have been on vyvanse for almost 2 years and have had no major symptoms. i had dry mouth, but that pretty much subsided. i did lose about 30lbs, but i&#039;m 5&#039;9&quot; and was weighing about 240lbs, so it wasn&#039;t as bad thing. i have adhd, i started this medicine when i was almost 40. i&#039;m almost 42 and really have had a great experience. my son is on it for add, and my daughter for adhd. she was just tested and accepted into the gifted program and he is 2 years younger and has had significant improvements to his grades and behavior. i would recommend."