A nurse is reviewing the laboratory results for a client receiving warfarin therapy. The client's International Normalized Ratio (INR) is 4.5. Which action should the nurse take first?
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A
Administer the next scheduled dose of warfarin.
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B
Prepare to administer protamine sulfate.
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C
Hold the next dose of warfarin and notify the healthcare provider.
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D
Document the finding as within the therapeutic range.