Until now, conventional treatments consist of a variety of immunosuppressive drugs, among which the most popular is prednisone, cortisone and prednisolone; they are inexpensive and very effective. Short-and long-term, they tend to be the worst in side effects.
The other drugs that are used are also aimed at suppressing the immune system, and for the moment there is no cure, you can only control the symptoms.
There is also the pyridostigmine, which helps the neurotransmitter that causes us to lack, among the proper way in muscles.