Dear Raglet, the theory is "controlling" or "putting into remission" the disease that is causing the neuropathy. I gather your lupus has never been in remission and I am so sorry about that. Of course if lupus is not in remission then you cannot halt the progress of neuropathy. I have been lucky enought to undergo 2 treatments of plasmapheresis and 1 of ivig which has halted further progression of my neuropathy past my knees. I hope you can find a treatment for your lupus that will help you go into a remission. There is no way of knowing how long a remission will last as it it not a cure.