Woman who are pregnant or may become pregnant, hemorrhagic tendencies or blood dyscrasias, recent or contemplated surgery of the CNS or eyes or traumatic surgery resulting in large, open surfaces, bleeding of the GI, respiratory or GU tracts, aneurysm, pericarditis and pericarditis effusion, bacterial endocarditis, spinal puncture, lumbar block anesthesia, hypersensitivity to warfarin or any other components of the products.