Vyvanse Euphoria

Currently on a vyvanse "binge" I guess you could say, I took a 70mg vyvanse around 7:40pm, eastern time, didn't experience much*euphoria*but could notice a little of the effects, took another one at about 2:30am, and another at about 9:00am, question is, is there any way of potentiating vyvanse to bring out the euphoric speedy effect that i used to get? Any tips or recconmendations are greatly appreciated, Thanks