a nurse is preparing to administer medications to a 4 month old infant which of the following pharmacokinetic principles should the nurse consider whe
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Nursing Elites

ATI RN

ATI Proctored Pharmacology 2023

1. When administering medications to a 4-month-old infant, which of the following pharmacokinetic principles should be considered? (Select all that apply.)

Correct answer: B

Rationale: When administering medications to a 4-month-old infant, the pharmacokinetic principle to consider is that infants have immature liver function until 1 year of age. This requires medications metabolized by the liver to be administered in smaller dosages. While infants do have a more rapid gastric emptying time, immature liver function is a more critical pharmacokinetic consideration in this context. Additionally, although infants have a poorly developed blood-brain barrier, this relates more to pharmacodynamic effects rather than pharmacokinetic principles. The statement about infants having an increased ability to absorb topical medications is not directly related to pharmacokinetic principles, making choice B the correct answer.

2. A client has been prescribed Phenelzine for depression. Which of the following indicates that the client has developed an adverse effect of this medication?

Correct answer: A

Rationale: Orthostatic hypotension is a known adverse effect of Phenelzine, a monoamine oxidase inhibitor (MAOI) used for depression. It is caused by a sudden drop in blood pressure when changing positions, leading to symptoms like dizziness or fainting. Monitoring for orthostatic hypotension is crucial during Phenelzine therapy to prevent complications. Choices B, C, and D are incorrect because hearing loss, gastrointestinal bleeding, and weight loss are not typically associated with Phenelzine use.

3. Before administering lithium to a client with bipolar disorder who has been taking the medication for 1 year, the nurse should check to see that which of the following tests has been completed?

Correct answer: A

Rationale: The correct answer is to check the thyroid hormone assay. Long-term lithium use can result in thyroid dysfunction, making it crucial to monitor the client's thyroid function regularly to detect any abnormalities early and prevent potential complications. Liver function tests (choice B) are not specifically associated with lithium therapy. Erythrocyte sedimentation rate (choice C) is a nonspecific test for inflammation and not directly related to lithium therapy. Brain natriuretic peptide (choice D) is a test used to diagnose heart failure and is not relevant to monitoring lithium therapy.

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

Correct answer: A

Rationale: The correct answer is to expect to feel drowsy. Clonidine is known to cause drowsiness, especially at the beginning of treatment. It is important for clients to be cautious with activities that require alertness until they understand how the medication affects them. Choice B is incorrect as there is no specific need to increase high-potassium foods with Clonidine. Choice C is incorrect as grapefruit juice can interact with many medications but is not a typical instruction for Clonidine. Choice D is incorrect as there is no specific indication to avoid foods high in fat with Clonidine.

5. A client with chronic myeloid leukemia is receiving hydroxyurea. Which of the following findings should the nurse monitor?

Correct answer: C

Rationale: The nurse should monitor the client for neutropenia when receiving hydroxyurea. Neutropenia is a common adverse effect caused by bone marrow suppression. It is essential to assess the client's white blood cell count regularly to detect neutropenia early and prevent complications such as infections.

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