Hi AGR. I'm on LDN 3.5 yrs now and still doing well. I did increase from 3 to 4.5 for the last 1.5 yrs. No MS progression, and no exacerbations, improvements have stayed, as in better balance, better mood, less spasticity and better strength. I still have most of the MS symptoms that stayed with me. Too bad LDN doesn't go back and wipe it all away.
The heat, is still a killer, but I manage to stay in the A/C, as much as possible. I have had some heat mini-flares, but getting plenty of rest and getting cool usually puts me back to normal.
I hope everyone else is doing as well. Try not to expect too much from your LDN. It doesn't work BIG miracles, just little ones, but, to me and for me, LDN is "Da Man".