It is very possible to overdose on Xanax. You say it was "presumed" she OD'd on her surplus Xanax. Was an autopsy done? I certainly don't want to come across as a "champion for Xanax," but I think you need more information before you lay this sad and very tragic death at the feet of Xanax.
I am very sorry for your loss.
Peace
Greenlydia
Yes its possible to over dose on xanax like any other medication. xanax is a benzo or a nervous system deppressant. Too much of it will cause your respitory system to shut down. I think what your asking is "if the withdrawl cuased her to commit suicide?" Yes, it could be a possiblity since xanax withdrawl can lead really bad phyiscal symtoms such a seizures or death or mental symtoms like panic attacks, anxiety depression, emotional unstability and suicidale thougths..I know this cause i went through it..but yea it just as bad as meth or heroin if not worst...