I haven't touched stims such asadderallorconcertain over a year, recently about a week and a half ago I took my first 70mg vyvanse, note: I took it after being up over about 24 hours if that had something to do with it, but I felt the speedy euphoric type effects I would from say adderall just not as strong, so I waited about 7-8 days expecting my tolerence to have gone down and took another 70mg vyvanse and redosed about every 4-6 hours and barely felt anything compared to the first time, is my tolerence just to high? Should I eat something before or during? Should i try lowering or double dosing? Any tips, suggestions, or advice is greatly appreciated, thanks