CIDP and Myasthenia Gravis

My neurologist just diagnosed me with Myasthenia Gravis a couple of months ago and she said that she had not seen anyone with both illness before and I was wondering if anyone else has MG? She also prescribed Mestion for the MG and I must say that I have not felt this good since I was first diagnosed 8 years ago. Once again, is anyone else taking Mestion?