Thanks, Write2, that helps. We thought originally you were looking for the new approved oral.
PPMS, I'm so sorry. LDN is not known to treat the disease, but I understand why your willing to try :( for symptoms.
I hope it brings you much needed relief! I'll look for some past discussions on LDN for you. and, link them here. Or, you can always go to "search this community" and type in LDN or low dose, etc.