Oh, and I know you don't have to worry about this with your DS, but I am a smoker (throw stones NOW), who is on/off again quitting. When taking the Vyvanse, I feel the need to smoke more. Thankfully for my health and those around me, I don't smoke at home, in front of DC, or at work, etc... but the craving is more. So if there is a "habit" that your DS has, don't be surprised if the desire to do so intensifies, if that makes sense (like 4evercropn saying her son cracked his knuckles more).