title: Biphasic interaction of phenytoin with warfarin.
mesh_terms: D000368:Aged; D004347:Drug Interactions; D005260:Female; D006801:Humans; D010672:Phenytoin / Q000009:adverse effects*; D011517:Prothrombin Time; D014859:Warfarin / Q000009:adverse effects*
chemical_list: D014859:Warfarin; D010672:Phenytoin