Warfarin (Coumadin) is an anticoagulant and interferes with the action of:

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Question 1 of 5

Warfarin (Coumadin) is an anticoagulant and interferes with the action of:

Correct Answer: B

Rationale: The correct answer is B: Vitamin K. Warfarin inhibits the action of vitamin K, which is essential for blood clotting. By interfering with the production of certain clotting factors, warfarin helps prevent blood clots. Choices A, C, and D are incorrect because warfarin primarily affects the vitamin K-dependent clotting factors and not platelets, calcium, or vitamin B12.

Question 2 of 5

When a patient is prescribed an oral anticoagulant, what should the nurse monitor for?

Correct Answer: C

Rationale: When a patient is prescribed an oral anticoagulant, the nurse should monitor for signs of bleeding. Oral anticoagulants work by inhibiting the blood's ability to clot, which increases the risk of bleeding. Monitoring for signs of bleeding such as easy bruising, petechiae, hematuria, or bleeding gums is crucial to prevent complications. Elevated blood glucose (Choice A) is not directly related to oral anticoagulant use. Decreased blood pressure (Choice B) is not a common effect of oral anticoagulants. Increased appetite (Choice D) is not a typical side effect of oral anticoagulants and is not a primary concern when monitoring a patient on this medication.

Question 3 of 5

For a patient on lithium therapy, which dietary recommendation is essential?

Correct Answer: B

Rationale: The correct answer is to increase sodium intake. Maintaining consistent sodium levels is crucial for patients on lithium therapy to prevent fluctuations in drug levels. Increasing caffeine intake (Choice A) is not recommended as it can interfere with lithium levels. While protein intake (Choice C) is important, it is not the essential dietary recommendation for patients on lithium therapy. Similarly, increasing fiber intake (Choice D) is not a key recommendation for these patients.

Question 4 of 5

Which medication should a patient with a history of peptic ulcer disease avoid?

Correct Answer: C

Rationale: Patients with a history of peptic ulcer disease should avoid Nonsteroidal anti-inflammatory drugs (NSAIDs) because they can worsen peptic ulcers due to their effects on the stomach lining. Acetaminophen (Choice A) is a safer alternative for pain relief in such patients as it does not have the same ulcerogenic effects. Antacids (Choice B) can actually help alleviate symptoms by neutralizing stomach acid and are generally safe to use. Antihistamines (Choice D) are not known to exacerbate peptic ulcers and can be used safely for conditions like allergies.

Question 5 of 5

A patient with hypothyroidism should be advised to consume more of which nutrient?

Correct Answer: B

Rationale: The correct answer is B: Iodine. Iodine is essential for thyroid hormone production, and its deficiency can contribute to hypothyroidism. While calcium, vitamin C, and iron are important for overall health, they are not specifically related to thyroid function. Calcium is more associated with bone health, vitamin C with immune function, and iron with red blood cell production.

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