A client taking warfarin (Coumadin) should be instructed to avoid herbal supplements such as green tea, ginkgo, feverfew, garlic, and ginger because these could:

Increase the risk for bleeding

Cause severe headache

Decrease the effects of the warfarin (Coumadin)

Cause severe hypotension

Answer and Explanation

The Correct Answer is A

A. Increase the risk for bleeding: Herbal supplements like green tea, ginkgo, feverfew, garlic, and ginger can potentiate the effects of warfarin by enhancing its anticoagulant properties. This increases the risk of bleeding, as warfarin itself is a blood thinner designed to prevent clot formation. These herbs can further inhibit platelet aggregation or enhance anticoagulation, leading to a higher risk of bleeding complications.

B. Cause severe headache: While some herbal supplements can cause headaches as a side effect, this is not the primary concern when combined with warfarin. The interaction between these herbs and warfarin does not commonly result in severe headaches. The primary issue is the increased risk of bleeding.

C. Decrease the effects of the warfarin (Coumadin): These particular herbal supplements do not generally decrease the effects of warfarin. In fact, they are more likely to increase its anticoagulant effects. Some other substances might interfere with warfarin's efficacy, but the herbs listed are known to enhance its bleeding risk.

D. Cause severe hypotension: Severe hypotension is not a common result of combining these herbal supplements with warfarin. The primary interaction is related to the blood-thinning effects, not to blood pressure regulation. Herbal supplements that might affect blood pressure are not typically those that interact significantly with warfarin in this manner.

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Correct Answer is D

Explanation

A. May improve cardiac function: This statement avoids claiming to diagnose, treat, cure, or prevent disease. It uses general language about supporting heart health, which is permissible.

B. May reduce pain and inflammation: Similar to option A, this statement avoids disease claims and uses general terms about pain and inflammation, which is allowed.

C. Helps promote a healthy immune system: This follows the same principle. It avoids disease claims and uses general language regarding the immune system.

D. Reduces blood pressure and the risk for stroke: This statement specifically mentions a disease (stroke) and claims to reduce its risk. Dietary supplement labels are not allowed to make disease claims. They can only make general claims about supporting bodily functions.

A. Trombin (Evithrom) B. Aminocaproic acid (Amicar) C. Aspirin D. Tranexamic acid (Cyklokapron)

Correct Answer is D

Explanation

A. Trombin (Evithrom): Incorrect: Thrombin (also known as factor IIa) is not typically used as a hemostatic drug. It is involved in the final step of the coagulation cascade, converting fibrinogen to fibrin to form a stable clot. However, it is not administered directly as a medication.

B. Aminocaproic acid (Amicar): Aminocaproic acid is an antifibrinolytic agent commonly used to control bleeding. It works by inhibiting the breakdown of fibrin clots, thus promoting hemostasis. It is particularly useful in situations where excessive bleeding occurs due to impaired clot dissolution. However, tranexamic acid is generally considered more potent and has a longer-lasting effect, making it the preferred choice in many situations.

C. Aspirin: Incorrect: Aspirin is an antiplatelet medication that inhibits platelet aggregation. While it can reduce the risk of clot formation, it is not primarily used for controlling postoperative bleeding.

D. Tranexamic acid (Cyklokapron): Correct: Tranexamic acid is another antifibrinolytic agent that helps prevent excessive bleeding. It works by blocking the breakdown of fibrin clots. Tranexamic acid is commonly used in surgical settings to manage bleeding during and after procedures.

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A client taking warfarin (Coumadin) should be instructed to avoid herbal supplements such as green tea, ginkgo, feverfew, garlic, and ginger because these could:

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Naxlex Comprehensive Predictor Exams

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Explanation

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Correct Answer is D

Explanation

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