Yes, I've been taking it for some years too with no ill effects. Maybe the combination with other meds?

No I've been talk it for years. Are you taking any other medications?

Right side like the arm too?

I noticed that it gives me crazy physical anxiety but besides that nothing really.

I had headaches prior to going on cellcept. Then, about a week after starting it, I kept getting the worst migraines ever! I went to my PCP, and she put me on propanolol, to prevent the migraines. She said the cellcept was very possibly causing the worsening of the headaches, though it's fairly rare. Since starting the propanolol, I have only had 2 migraines! (And that was in July 2015) I still get very minor headaches, but not near what they had been even prior to the cellcept.