I've been prescribed 30 mg Vyvanse for adhd. I have been taking it for about 5 days. The first 2 days, it seemed to work well and i was feeling great. The rest of the days after that, it seemed like the vyvanse got weaker. When i take it, i only seem slightly focused, no motivation at all, and it feels completely gone by 12 ( i take it at 6:30). Vyvanse also seems to kick in extremely slow for me which is about 2 hours. I start to feel it classes i don't need it for, and it leaves the rest of the day in the classes i need. Should i ask my Pdoc for higher dose, or a different drug? Should i take 1 more than my prescribed dose (2 pills in all)? This is the last week of school, and i really need to concentrate; its hard when i feel my adhd coming back, when i really want to pay attention and study.