Wow! I never heard of those meds causing RA. My brother has been on Lithium for over 30yrs, and fortunately no problems.
I had a professor who was on Lithium for ages, and no problem.
Does Prozac have a long term side effect of RA?
I have Hashimoto's disease with nodulars, and while reading several books, I've seen some doctors/researchers are seeing a link with people that are hypothyroid also falling victims to RA,Fibromyalgia,Diabetes,Depression,etc.
Do you suffer from hypothyroidism? Can that be the culprit vs the meds?
I do know Lithium levels and thyroid function blood work nees to be done while on Lithium, cause in some people Lithium can cause hypothyroidism.
One can still continue to use the Lithium, and just be on thyroid meds along with it, really no problem too, if both medications help one maintain good quality to their lives.

I hope all works out for you. If you haven't already, talk to your doc of other options that may be out there, keep the faith.


Take care,
DE