The use of MJ in the treatment of pain and other related MS problems has been available in Canada for a number of years now. A physician's rx is required and the MJ is purchased from certain pharmacies where the MJ is supplied from government sources.
Unfortunately in the US, just the mention of the "MJ" word drags up all kinds of political hysteria. Science is placed in the back room and everyone's morality issues take over. As more and more of these case studies are done in the US, the medical scientists are discovering that medical MJ does indeed work in certain applications.
Let's hope that in the end, science trumps politics and MJ is made available to those it can help relieve pain and suffering.