I have MS and Ulcerative Colitis, and take a Sulfa drug for the UC. I have many sensitivities to meds (so much so that I don't take any of the mainstream drugs for MS), but I have no apparent problems from Sulfasalazine. I've been using this drug, as required, for over 20 yrs.

A disease which has many similar symptoms to MS is Porphyria, and Sulfa drugs (and many other meds) are NOT recommended with this condition!! Since you are not dx with MS yet, you might want to look this disease up to see if there is a fit (NOTE: I think there are 8 different "strains" of Porphyria, so look for descriptions on each).

Cherie