which of the following is the primary site of activity for the drug warfarin
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Nursing Elites

ATI RN

ATI Pharmacology Proctored

1. Which of the following is the primary site of activity for the drug Warfarin?

Correct answer: B

Rationale: Warfarin primarily affects the liver where it inhibits the synthesis of clotting factors.

2. A client in a long-term care facility has Hypothyroidism and a new prescription for Levothyroxine. Which of the following dosage schedules should the nurse expect for this client?

Correct answer: D

Rationale: The nurse should expect that levothyroxine will be started at a low dose and gradually increased over several weeks. This cautious approach is crucial, especially in older adult clients, to prevent toxicity and ensure optimal therapeutic outcomes for managing hypothyroidism. Choice A is incorrect because starting at a high dose and tapering as needed is not the standard approach for levothyroxine. Choice B is incorrect because the initial dosage is typically adjusted to reach the optimal therapeutic dose. Choice C is incorrect as adjusting the dosage daily based on blood levels is not necessary for levothyroxine, as it has a long half-life and requires time to reach a steady state.

3. A healthcare professional is planning to administer IV Alteplase to a client who is demonstrating manifestations of a massive Pulmonary Embolism. Which of the following interventions should the healthcare professional plan to take?

Correct answer: B

Rationale: The correct intervention when administering IV Alteplase is to hold direct pressure on puncture sites for 10 to 30 minutes or until oozing of blood stops. This helps prevent bleeding complications associated with thrombolytic therapy. Administering IM Enoxaparin is not indicated with Alteplase, as it is an anticoagulant rather than a thrombolytic agent. Aminocaproic acid is not typically administered prior to alteplase infusion in the context of a massive Pulmonary Embolism. While timely administration of Alteplase is important, the specific timeframe within which it should be administered may vary based on the clinical situation, so a strict 8-hour window is not universally applicable.

4. A client has a new prescription for Phenytoin. Which of the following instructions should the nurse include?

Correct answer: A

Rationale: The correct answer is to instruct the client to brush and floss their teeth regularly. Phenytoin can lead to gingival hyperplasia, making oral hygiene crucial to prevent complications. Encouraging good oral care practices helps reduce the risk of adverse effects on the gums and teeth. Avoiding grapefruit juice is not specifically related to Phenytoin. While some medications require intake with food, Phenytoin is usually taken on an empty stomach for better absorption. Increasing calcium-rich foods is not directly associated with Phenytoin therapy.

5. A client is starting a new prescription for ferrous sulfate. Which of the following instructions should the nurse include?

Correct answer: C

Rationale: The correct answer is C: 'Take the medication with orange juice to enhance absorption.' Taking ferrous sulfate with orange juice helps enhance the absorption of iron due to the ascorbic acid present in the orange juice, which aids in iron absorption. This combination can help improve the effectiveness of the medication. Choice A, taking the medication with meals, may reduce gastrointestinal side effects but does not specifically enhance absorption. Choice B, taking the medication on an empty stomach, may lead to better absorption but can also increase the risk of gastrointestinal side effects. Choice D, taking the medication with a full glass of milk, is incorrect because calcium in milk can inhibit the absorption of iron.

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