Not a lot of information, but there are some trials mentioned near the end. Personally, I think I will be sticking with ldn for a good while yet (ok, for ever).
Progressive MS trials at the MS Research Day
My open minded GP prescribes ldn on the NHS and has done for eight years, so always worth trying yours out first. If that fails then the drug is easily available privately and e med can issue a prescription if you provide evidence that you have MS. Many people on here forward the script to Dicksons Chemist in Glasgow and receive their ldn by post. The details are on this site:
Let me know if you need any help.