Tons of info is on the site at
www.lowdosenaltrexone.org
I am trying it for... MG and/or Fibro and/or whatever it is that I have. Whatever I have I think it's related to my immune system not working in the right way.
I've read that a bunch of people couldn't convince their doc to prescribe it for them. If you can, it seems worth a try. Side effects are generally no big deal.