When I first took this medication, it was incredible and I had full clarity for the entire day. Even at 10mg. Now I am taking 3 15mg IR tablets across the day and feel prompted to take even more to get less than half of the previous result for a shorter period of time. I think this is kind of a dangerous cycle due to the passive levels in my body, and it's not bringing much relief. In fact, the roller coaster of withdrawals that have come with it on top of the pre-existing irritating hyperactivity is quite difficult to live with let alone study complex subjects under. Can anyone here relate and have experience with different medication they are willing to share? Doc doesn't want me on XR yet, so I was going to research Vyvanse.