Hi, I'm sorry about your husband. My mother suffers from SFN she has also been undergoing the same horrible pain. IVIG, has helped my mother tremendously for a few months, she even would forget to take her pain meds. Although, unfortunately after several months, the therapeutic effects began to stop. Fortunately for you, her doctor claims that this is not normal and typically doesn't just stop working. Also, I have been doing my own research and found a researcher at Penn State. Dr. Zagon, who's research focused on the therapeutic properties of LDN (low dose nalextrone) for autoimmune. The medicine was originally used for opiate/alcohol dependence disorders. I spoke to him directly about this drug and I quote he said "it should be a winner". Although, the only downside is very very few pharmacies carry this drug. Only, because it needs to be compounded on site which requires a differentiated pharmacy. If you happen to be from NJ or NY. I have an extensive list of physicians who are familiar with this drug and are willing to prescribe it. Hope this helps.

Ralph