"my son (adhd) has been on vyvanse for about 3 years now, and i love it. he is 10 years old now. he started out on focalin which he took for about 3 months and never seen a change in him. so his doctor switched him to vyvanse and the very first day i noticed a change in him. calm and relaxed, but not a zombie like i heard a lot of adhd medicines do. he always made a&#039;s &amp; b&#039;s but since on vyvanse he has made all a&#039;s, i believe it&#039;s due to he is able to sit still in his seat and concentrate more.  the only side effect i have seen in him is his appetite.  he does not have one and is on the skinny side.  but we found a way to get him to eat so hopefully he will gain amlittle.  other than that this medicine its wonderful."