Found an interesting recent article on LDN in MS and autism. It doesn't go into any details about MS but it does mention it as helpful:

http://www.dailyevergreen.com/disp_s...?storyId=19110

"Naltrexone has shown to be most effective in controlling autism symptoms when taken in small doses. It also helps in other areas, such as stabilizing multiple sclerosis and controlling cancer growth. "