If that dose is indeed correct, you need to speak to the physician
prescribing it and demand that you begin a slow taper. Actually, on second thought, I would go to another physician, as any physician that is prescribing that potentially lethal a dose of Xanax should have his or her license revoked.
Ten milligrams of Xanax, especially in an elderly person, can cause severe respiratory depression, coma, confusion, falls, etc.
Please work diligently to get off this medication.