^Agree with Tommyboy
I have a boatload of xanax, enough that if I used them regularly I would have quite a dependence. I get some hard to handle nightmares when I take xanax, either the same night or a couple days later. That's been enough to keep me at bay with this drug. In general, if the side effects are worse than the reason I'm taking the drug in the first place, I try to put it down.
Some rules I carry for xanax are never use more than 1mg, never dose on consecutive days, and max dose twice a week or 7 times in a month. I haven't suffered W/D from xanax. Atleast I don't remember any W/D. Maybe my nightmares WERE the W/D? I don't get them much now but when I do the first question I ask is, when was the last time I took some xanax?
Sorry to hear about your Grandfather, man.