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I'll just drop this in and maybe it'll help. Maybe/hopefully somebody has already said this and I'm just repeating the advice.
I used to work for GSK, so I know a little about Paxil. In general, it seems to be a bad idea to stop taking the drug suddenly. Many folks have reported a myriad of bad symptoms after quitting suddenly - suicidal thoughts/actions in teens have been widely reported, but issues seem to be pervasive among the rest of the population as well.
She needs to see her doc and get herself sorted out again. If she wants to quit Paxil, there may be a way to do that; but I don't think any psych. familiar with the drug would recommend quitting w/o stepping down the dosage.
DISCLAIMER: I'm in no way a medical expert and I don't at all represent GSK. If pushed, I might be able to come up with material support for some of these suggestions, but I'd just be google searching like the rest of you.
My $.02...
Chris