Pyridoxine: Cycloserine, ethionamide, hydralazine; immunosuppressants, such as: Azathioprine, Chlorambucil, corticosteroids, corticotrophin (ACTH), Cyclophosphamide, Cyclosporine, Mercaptopurine, Isoniazid and Penicillamine, Estrogen and contraceptives, Estrogen-containing, Levodopa.
Cyanocobalamin: Aminoglycosides; aminosalicylic acid; anticonvulsants, biguanides; chloramphenicol, cholestyramine, cimetidine, colchicine, potassium salts and methyldopa.