A client discloses they are taking warfarin and asks about using St. John's Wort for depression. What is the most appropriate response?
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A
Recommend St. John's Wort at a low dose
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B
Explain the interaction risk and refer to their prescriber before proceeding
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C
Suggest switching from warfarin to a natural blood thinner instead
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D
Provide St. John's Wort only if the client signs a waiver