A patient who is taking warfarin has an international normalized ratio (INR) of 5.5. The nurse will anticipate giving
a. fresh frozen plasma.
b. intravenous iron.
c. oral vitamin K.
d. protamine sulfate.
ANS: C
Vitamin K is an antagonist against warfarin, an oral anticoagulant. Patients with an INR of 5.5 should be given a low dose of oral vitamin K. Too much vitamin K may reduce the effectiveness of warfarin for up to 2 weeks. Fresh frozen plasma and intravenous iron are given for anemia caused by blood loss. Protamine sulfate is given for heparin overdose.
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