Tolerance already??

[excavator_12]

let me start by saying that SWIM has been prescribed adderall for about 4 or 5 months now. His script was for 3 20mg IR's a day. Usually he'd burn through them before the month was up by binging a few times. Recently he got his script changed to the same dosage, but in XR. actually he got the XR script in addition to the IR one...

So last weekend, SWIM starts a mild binge. Don't know how much he took altogether...but it was a lot. the binge lasted until late monday night/early tuesday morning.... at that point it was harder to feel the effects, had to take a lot more. even then there was no euphoria, just energy.

swim took the next day off completely. Now he tried some again this morning for school work.... 2 20mg XR and a 20mg IR...felt almost nothing, except a bad headache. Later the same day, came home ate a small lunch and drank some baking soda/water. hour later popped 2 20mg XR, not really feeling it an hour later.

it used to be that 2 20mg XR's would have SWIM high as shit, focused.

could that last long binge have increased his tolerance that much, that fast? Or did he just burn out whatever neurotransmitters or whatever (seratonin, dopamine, etc) are responsible for adderall doing what it does? If that's the case what can SWIM do to replenish himself?