"i have been taking vyvanse on and off for a little over 2 years. i am currently taking 70mg. it really helps me focus and multi-task at work. it also has helped with my anxiety and i am able to tackle things that normally i would try to stay away from doing because of my anxiety. i usually take it during the weekdays and not take it on the weekends because i can go 10 to 12 hours without eating and barely having anything to drink because my appetite is not there. i&#039;ve lost 95 pounds since taking vyvanse. it also has made my libido go through the roof. there&#039;s an upside and downside to the medication. overall, it has helped more than it has hurt but there are negatives and positives."