I do not have MS (I hope not anyway)- I do have tremor and jerks. Magnesium originally seemed to help the tremor and jerking, but recently the tremor has returned. The jerking is still around 99% controlled. If you do long term magnesium supplement, I recommend the chelated types since the body seems to absorb them more efficiently, and with magnesium, that is good. The standard type can give you intestinal problems.

Concerning intestinal reaction to Magnesium, The gentlest forms are Oxide and Taurate.
They do not bother me, and I have very sensitive gut to many harsher medications, including the Mag. the Physician "prescribed". However, my forms are more expensive.
I hope I can still get them in the future, have enough money or that the gov't does not
put them all on restrictive prescription. I take a little Klonopin but it does not do as much as mag for my Myoclonus. I also take 1000 mg of Calcium per day, not at the same time as Magnesium as they are antagonists. And of course D3 1000 units.

You can't imagine how bad my jerks are if I don't take this. I fear greatly what will happen if in my very old age I am deprived of this remedy. Jerking all night is totally
exhausting.