With respects to the doc at that er, the xanax
withdrawal is what will kill you, not
methadone or other opiate withdrawal. I'm surprised at the meds you were given; I am assuming that they figure you were too far out to worry about DTs from benzo withdrawal, but typically withdrawal from benzos (xanax or alprazolam,, valium or diazepam, ativan or lorazepam,, etc) is treated with antiseizure meds like barbiturates or depakote.