Side effects of azathioprine may include difficulty fighting infections and nausea. Rare side effects include
liver damage, pancreas inflammation (pancreatitis) and cancer.
Other immunosuppressants. If you don't respond to prednisone or azathioprine, your doctor may prescribe stronger immunosuppressants, such as mycophenolate (CellCept), cyclosporine (Neoral, Sandimmune, others) or tacrolimus (Prograf).