[Pfhreak]

According to Wikipedia, withdrawal symptoms can be severe including seizures, vomiting, etc. To do nothing of the discomfort from a lack of sleep. It would take incredible will power to overcome something like that.

It also sounds like there are some treatments that can help fight an auction, including other medications that bind to some of the same receptors. Or very slowly weaning someone off (but then you have to figure out something else for the insomnia.)