I have seen and read your answer to the previous question about receiving a false negative Xanax test. I, too, tested negative for Xanax even after taking 0.25mg 4-5 hours earlier on the day of testing. My prescription, though continually written incorrectly by this doctor, is for 0.25mg, 1, 3 times a day as needed but not everyday. That was what my original prescriber told me. Now my bottles simply say to take 3 times a day. I normally average about 1 per day, however, I have an undiagnosed problem with my mouth that has me really stressed out, so I actually believe that, for the period I was being tested for, I had been taking the 3 a day. I was wondering if there are any medical journal publications or any other articles that may help my doctor to see that there is at least a chance that I did not break the controlled substance agreement I signed for her? I am just so confused and they won't prescribe the Ambien for me anymore which I need even more than the Xanax. Thank you, Barbara