I am not sure just a CSF inhibitor will help if prednisone doesn;t. But is she on gabapentin or has Lyrica been tried if gabapentin didn't work? An NSAID and/or CSF drug alongside either of those? Clare Rusbridge's treatment algorithm goes through just about everything else long before prednisone/prednisalone... gabapentin/lyrica is generally what helps most with scratching, not prednisone (and especially -- without prednisone's side effects).