Per prescription I take my 50 mg Vyvanse every morning around 6 am. Been on Vyvanse for about a month now and definitely have built up a tolerance to the drug. Anyways, since I started Vyvanse I haven't really had much time to mess around with any other drugs so am kind of clueless on Vyvanse effects on recreational doses of other drugs. Tonight, I'd like to pop a few perks in a recreational dose but was curious if the Vyvanse from earlier might dull the opiate euphoria. Anyone have any experiences in this?