the effect of administration for three days of acetylsalicylic acid ( 1500 mg/day ) , phenylbutazone ( 300 mg/day ) , paracetamol ( 1500 mg/day ) and tolfenamic acid ( 300 mg/day ) on serum concentrations of phenytoin and carbamazepine were studied in a group of patients on continuous antiepileptic therapy .
C0031507
phenytoin
C0003299
antiepileptic