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. What is a desired outcome of the drug Phenytoin?

Correct answer: C

Rationale: The correct answer is C: Decrease or cessation of seizures without excessive sedation. Phenytoin is primarily used as an antiepileptic medication to manage and prevent seizures. It does not directly impact symptoms of PTSD (Choice A), resolution of signs of infection (Choice B), or prevention or relief of bronchospasm (Choice D). Therefore, the desired outcome of Phenytoin is to control seizures effectively while avoiding excessive sedation.

3. When administering the drug lithium, what is one important side effect to watch for?

Correct answer: C

Rationale: When administering lithium, it is crucial to watch for the side effect of angioedema. Angioedema is a potential adverse reaction associated with lithium therapy, characterized by rapid swelling beneath the skin, often around the eyes and lips. Monitoring for this side effect is essential to promptly address and manage any signs of angioedema that may occur during lithium treatment. Choices A, B, and D are incorrect because anaphylaxis, seizures, and pulmonary edema are not typically associated side effects of lithium administration.

4. A client is taking Epoetin Alfa for anemia. Which of the following laboratory tests should the nurse monitor to evaluate the effectiveness of the therapy?

Correct answer: C

Rationale: The nurse should monitor the hematocrit level to evaluate the effectiveness of Epoetin Alfa therapy. Epoetin Alfa stimulates red blood cell production, leading to an increase in hematocrit levels. Monitoring the hematocrit helps assess the response to therapy and ensures that the medication is effectively addressing the anemia. White blood cell count and platelet count are not directly affected by Epoetin Alfa therapy. Serum potassium level monitoring is important for other medications that may impact potassium levels but is not specifically relevant to assessing the effectiveness of Epoetin Alfa in treating anemia.

5. A healthcare professional is reviewing laboratory results for a client who is receiving heparin via continuous IV infusion. Which of the following results indicates that the heparin infusion should be increased?

Correct answer: A

Rationale: An aPTT of 90 seconds is above the therapeutic range for heparin, which typically falls between 60-80 seconds. This indicates that the current heparin dose is too high, and the infusion rate should be decreased to avoid excessive anticoagulation and the risk of bleeding. Monitoring aPTT is crucial in adjusting heparin therapy to maintain it within the therapeutic range.

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