Warm antibody hemolytic anemia Warm antibody hemolytic anemia is the most common form of autoimmune hemolytic anemia (AIHA); it is more common among women. Autoantibodies in warm antibody hemolytic anemia react at temperatures ≥ 37 ° C Autoimmune hemolytic anemia may be classified as Primary (idiopathic) Secondary (occurring in association with an underlying disorder such as systemic lupus erythematosus (SLE), lymphoma, or chronic lymphocytic leukemia or after use of certain drugs) Some drugs (eg, methyldopa, levodopa —see table Drugs That Cause Warm Antibody Hemolytic Anemia) stimulate production of autoantibodies against Rh antigens (methyldopa - type of autoimmune hemolytic anemia).