A client with type 2 diabetes and atrial fibrillation on warfarin begins taking ginseng to boost the immune system. After health education, what is the nurse's priority action?

A client with type 2 diabetes and atrial fibrillation on warfarin begins taking ginseng to boost the immune system. After health education, what is the nurse's priority action?

• A. Collaborate with the care team to have the client's prothrombin time and INR assessed.
• B. Immediately discontinue warfarin.
• C. Advise the patient to take more ginseng.
• D. Do nothing.

Answer: (A)

Managing drug–herb interactions is the key idea here. When a client on warfarin begins an herb like ginseng, the clinician must verify how the anticoagulation is being affected before making any changes. Warfarin has a narrow therapeutic window, and its effect is monitored with the prothrombin time and the international normalized ratio (INR). Ginseng can alter this balance, potentially increasing bleeding risk or, less predictably, reducing anticoagulation. By prioritizing an assessment of PT/INR and coordinating with the care team, the nurse helps determine whether the current warfarin dose remains appropriate or if adjustments are needed under medical guidance. This safeguards the patient’s stroke risk from AF and their bleeding risk from anticoagulation. The other actions don’t address safety in the presence of a possible interaction: abruptly stopping warfarin could cause a thrombotic event, recommending more ginseng is unsafe, and doing nothing misses a real drug–herb interaction that could shift coagulation outside the therapeutic range.

Managing drug–herb interactions is the key idea here. When a client on warfarin begins an herb like ginseng, the clinician must verify how the anticoagulation is being affected before making any changes. Warfarin has a narrow therapeutic window, and its effect is monitored with the prothrombin time and the international normalized ratio (INR). Ginseng can alter this balance, potentially increasing bleeding risk or, less predictably, reducing anticoagulation. By prioritizing an assessment of PT/INR and coordinating with the care team, the nurse helps determine whether the current warfarin dose remains appropriate or if adjustments are needed under medical guidance. This safeguards the patient’s stroke risk from AF and their bleeding risk from anticoagulation.

The other actions don’t address safety in the presence of a possible interaction: abruptly stopping warfarin could cause a thrombotic event, recommending more ginseng is unsafe, and doing nothing misses a real drug–herb interaction that could shift coagulation outside the therapeutic range.