I recently had to take a routine toxicology test when having my Adderral refilled. I was just informed today by my doctor that the test came back and that there were no traces of the drug in my system, therefore, he will no longer prescribe it for me. I am extremely confused about the results & to make matters worse,he refused to explain anything to me. I take my medication, 40mg, every day at the same time, 6AM and never miss my dose. Is there a reason, other than possibly a false negative result, that the medication would not be in my system only a few hours after taking it? I can't function without this medication. Any ideas would be greatly appreciated.