My 10 year old son is on 70mg of vyvanse... I believe he has bn Miss diagnosed!!! This med does not prevent him from eating and is now eating everything in sight and is now weighing 160lbs... He complains about being dizzy and sometimes having stomach and chest pain... could vyvanse cause this??? Also he is not any calmer or does not concentrate any better i feel that he cannot stop talking and that it gives him more energy rather than calm him down... can someone please help me???