I started taking these stimulants like vyvanse in college about five years ago. Although I can exhibit symptoms from time to time, I do not think at all that it is medically necessary for me. After trying them once, it made things a lot easier, and besides a few episodes, the good effects have been able to balance out the bad. I do get very worried occasionally though that I will have to suffer long term consequences. I am very much dependent though now this fear has not yet been strong enough to get me to stop.