Bone marrow apalsia is seen with all except ?
Methicillin
Chloramphenicol
Alpha methyl hydantoin
Phenylbutazone
Ans. is 'a' i.e., Methicillin Causes of drug induced aplastic anemia Antibiotics Chloramphenicol Cotrimoxazole Nitroforantoin Antiinflammatory Phenylbutazone lndomethacin Diclofenac Antithyroid Carbimazole Methimazole Methylthiouracil Psychotropic Phenothiazine Anticonvulsant Phenytoin (alpha methyl hydantoin) Antirheumatic Gold salts D penicillamine Cytotoxic drugs Vincristine Adriamycin Methotrexate Chlorambucil