"i&#039;m a 20 year old college student and i&#039;ve been on vyvanse 30 mg for a year and a half. when i first started taking vyvanse it was amazing but it&#039;s effects have become very mild at this point. i probably need to get my doctor to bump up my dose. if i take a week off or don&#039;t take it as frequently i get much better results. overall, i feel in complete control when i take it and my confidence is very high. however, sometimes when i&#039;m on it i experience feelings of extreme worry about the future; these feelings are always very brief though and don&#039;t infringe on my well-being at all."