A Patient Is Due to Receive a Scheduled Dose of Warfarin

Multiple Choice

A patient is due to receive a scheduled dose of warfarin 2.5 mg by mouth.A nurse notes that the patient's prothrombin time (PT) is 24.1 seconds and international normalized ratio (INR) is 3.77.Which action by the nurse is most appropriate?

A) Administer the warfarin as ordered.
B) Contact the requesting health-care provider for an increased dose.
C) Give one-half the dose ordered and notify the requesting health-care provider on rounds the next day.
D) Hold the dose and immediately notify the requesting health-care provider of the result.