I have developed high BP since having MG. I started Mestinon last Aug. I do not take Prednisone. This spring my BP got real high. It was 160 -180/90-100. Kind of scary high. My Dr. did not seem to think it was MG related. My thought was why not, everything else seems to be. Now I take BP medicine and it is under control. Since this I have started CellCept.