my heart goes out to you and your sister. unfortunately, when dealing with the psyche and soma connecection, anything is possible. your siste could be having an major rejection to her medication. ask her dr if she can go off the med for a few weeks. if she improves, you probably have the culpret. if she doesn't omprove after a few weeks, it sounds like a major psychotic event and she needs a really good pdoc. i have experienced this kind of thing myself and, believe me, it wasn;t fun. i'd rather watch the cartoon cahnnel for three days with my great-grandkids than go through that again. how did i get over it? i quit taking the meds that were causing the problem cold tyrkey. it was a stupid move because i didn't involve my dr. but it was effective. i would never do it that way again. i would get professional help with the withdrawl.
hope my experience helps.