i'm pretty sure that thats impossible bc adderall is a perscription drug and I always thought that it was impossible to build a tolerance on perscription drugs.This is bullshit -- prescription drugs are really NO DIFFERENT than most abused drugs, hell, cocaine is a prescription drug, and so is heroin (in Britain at least I think.) You CAN get a big tolerance to Adderall... what's worse, this appears to be permanent.
I don't do stims often -- no more than once every couple weeks, on average less, not very much at once -- but it takes me 60+ mg of Adderall to have a good time now, whereas it only took 30mg when I first started. If you listen to Phreex and some other ex-stim fiends they will tell you that small amounts of stimulants just put them to sleep now.... sucks.