You were taking adderall xr 20mg a day for five months you have not taken adderall for three months Will it still be detectible in drug test?

Unlike marijuana, Adderall is not fat-soluble, thus the window for detection is significantly smaller. However, in your situation, it will most likely appear on a drug test, as the detection period for it is three to five days. However, it is still possible, that over-hydration and intensive exercise could flush it out of your system faster than that.