"i really want parents to take a good look at what they may be about to give their children before they do so. if dopamine deficient; vyvanse will initially appear to be amazing. until a &quot;tolerance&quot; is built up when it will leave a person feeling as low/moody and agitated as they ever have. recent studies indicate that mood disorders may mask themselves as add/adhd. if you or your child is experiencing any of the major or severe emotional side effects of this or other stimulants; please consider that it could be mood disorders brought on by a dopamine deficiency. this is what happened to me and because i was aware of the symptoms of dependency and mood disorder, i recognized it immediately."