Hi , I was trailed on Azathioprine/imuran for a autoimmune disorder , which has very few drugs tested for it.
It gave me the most intense pain I have ever experienced, the pain in what felt like the bones in my forearms, was like them being lite on fire while being driven over by a 10 ton truck. I was taken off it, the pain went. I have a tendency to react very strongly to drugs that others have little to no symptoms on in general .Then micofenalate ( cell cept).
I'm became incoherent with extreme headaches.
Keep fighting your not alone.