Desensitization to procainamide.
D000380:Agranulocytosis / Q000139:chemically induced*; D001145:Arrhythmias, Cardiac / Q000188:drug therapy; D003888:Desensitization, Immunologic; D006801:Humans; D007970:Leukopenia / Q000139:chemically induced; D008297:Male; D008775:Methylprednisolone / Q000627:therapeutic use*; D008875:Middle Aged; D011342:Procainamide / Q000009:adverse effects / Q000378:metabolism / Q000627:therapeutic use*
D011342:Procainamide; D008775:Methylprednisolone