Did a very fast taper off xanax (alprazolam) thus the 6th day and down to a 1/4 but feel great went from 1mg 2xday(9mo to 2mg (5dys to 1/2(5dy have bad smell nose?

Not usual: Glad to hear that your xanax (alprazolam) taper has generally gone smoothly. I gather from your question that you are sensing a bad smell now, and no one else around you smells it. We call that an olfactory hallucination, and it is not a typical experience when withdrawing from xanax (alprazolam). Another possibility is that your olfactory senses are just a little more acute without xanax (alprazolam). If persists, tell your doctor.