The Nurse Practitioner. 23(6):146, JUNE 1998 Issn Print: 0361-1817 Publication Date: June 1998 Print Acetaminophen Increases Warfarin's Anticoagulant Effect Hylek EM;Heiman H;SJ Skates; + Author Information Acetaminophen and other risk factors for excessive warfarin anticoagulation. JAMA 1998;279(9):657–62Bell WR: Acetaminophen and warfarin: undesirable synergy. JAMA 1998;279, (9):702–03 (editorial). Checking for direct PDF access through Ovid Abstract Abstract unavailable for this article.