In January she started having pain in her legs. It hascontinued to get worse. She now has real bad pain and has trouble walking or just standing. Could the Xanax be causing this? My sister took it years ago and said she had trouble like this and it wea changed to clonpin and it wnt away afte a while. My mom went to the dr. and he said it wasn't the Xanax but they haven't really told us what it is either. Could my sister be right?