"i am fifteen years old and started taking vyvanse 30 mg dose in october.  i moved to 50mg and am now at 70mg.  at the lower dose i noticed definite improvement in my attention span and work ethic.  on the 70mg i feel anxious, depressed, and i have headaches constantly.  i feel like isolating myself socially from everyone else and am extremely moody.  i do not recommend more than 50mg of this medication to anyone."