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Severity: High - Risk of internal bleeding
Those who take acetaminophen along with the widely used blood-thinning drug warfarin may face the risk of serious internal bleeding. People on warfarin who take acetaminophen for at least seven days in a row should be closely watched for bleeding.
Mitigation: Jan 5, 2014 by Dr. Adam Careful:
Asked patient to discontinue regular use of Tylenol and to consult with clinician if they need to resume to allow appropriate INR monitoring
Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.