in 52 ( 48.1 % ) of the patients with aplastic anemia , the following etiologic factors were implicated : benzene ( 25 patients ) , antirheumatic drugs ( ten ) , chloramphenicol ( four ) , chloramphenicol plus hepatitis or chromosome anomalies ( two ) , thiamphenicol plus sulfonamide ( one ) , antituberculous drugs ( three ) , daraprim ( three ) , insecticides ( two ) , hepatitis ( one ) , and sulfonamide ( one ) .
C0008168
chloramphenicol
C0039854
thiamphenicol