"i have only been on this medicine for about two weeks at 20mg but it has completely changed me! it&#039;s awesome! i suffer from depression, anxiety, and add and was prescribed lexapro to help with me depression and anxiety, it bumped up my mood a little but i still had depression and anxiety symptoms. the first day i took vyvanse it kicked in after an hour and automatically i was more awake, happy, confident, talkative, and focused! it helped me so much with college when before i was failing almost all my classes i am in such a better mood now life is great! the only down side so far is it makes me really hungry at times and i have trouble falling asleep and staying asleep through out the night but it&#039;s worth it!!"