Medical Marijuana
Medical Marijana (MMJ) is approved to treat MS in the state of California.
For more information, see this article: Is Medical Marijuana Right for My MS?.
We also recommend this comprehensive book, The Medical Cannabis Primer, to help you understand how to use MMJ correctly. The book is loaded with useful photos, tables and charts, and it includes a chapter on Risks. You don't need to get high to garner benefits from cannabis.