I was having the same problem after my rheumy started me on cell cept (generic) and it progresively got worse, along with quite a few other side effects while trying to taper me off the prednisone slowly, after seeing my rheumy again he took me off the cell cept and put me back on 40mg prednisone, put me back on quinacrine, and back to 500mg plaquenel twice daily instead of once all the side effects slowly went or are still going away. The cramps that I went through were almost unbearable. Tough guy huh haha. I don't know what meds you are on but I hope some of this helps. God Bless. Jim.
Blessed be the God and Father of our Lord Jesus Christ, the Father of mercies and God of all comfort, who comforts us in all our tribulations, that we may be able to comfort those who are in any trouble, with the comfort wich we ourselves are comforted by God. 2 Corinthians 1:3