Azathioprine provides long-term immunosuppression with relatively few side effects. However, it has a long latency before benefit begins, and some patients do not improve at all. Mycophenolate mofetil may be a useful substitute for azathioprine with fewer side effects and a shorter latency of action. More experience is required. Human immune globulin are used when MG patients have life-threatening signs such as respiratory insufficiency or dysphagia and a very rapid response to treatment is desired.
PE is preferred.