what is pharmacodynamics
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Nursing Elites

ATI RN

ATI Proctored Pharmacology 2023

1. What is pharmacodynamics?

Correct answer: B

Rationale: Pharmacodynamics refers to the drug's actions at receptor sites and the physiological, chemical, and behavioral effects produced by these actions. It involves understanding how drugs interact with the body at the molecular level to produce their effects, including mechanisms of action, receptor binding, and downstream physiological responses. Choice A is incorrect because it describes pharmacopeia, which is a reference book containing standards for drugs. Choice C refers to efficacy, which is the maximum effect a drug can produce. Choice D describes pharmacokinetics, which focuses on the movement of drugs within the body.

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. A client is starting therapy with filgrastim. Which of the following adverse effects should the nurse instruct the client to monitor?

Correct answer: A

Rationale: When a client is starting therapy with filgrastim, monitoring for bone pain is essential. Filgrastim can lead to increased bone marrow activity, resulting in bone pain as a common adverse effect. Instructing the client to monitor and report any bone pain promptly can help in managing this side effect effectively.

4. A client has a prescription for a Nitroglycerin transdermal patch. Which of the following instructions should be included by the healthcare provider?

Correct answer: D

Rationale: The correct instruction for a Nitroglycerin transdermal patch is to place it over a hairless area of the body. This is essential to ensure proper adhesion and consistent absorption of the medication. Hair can impede the patch's ability to stick to the skin and deliver the medication effectively. Therefore, choices A, B, and C are incorrect. Applying the patch to the same site every day (Choice A) may lead to skin irritation, removing the patch every 12 hours (Choice B) is not typically recommended for Nitroglycerin patches, and massaging the patch after applying it (Choice C) could alter its integrity and affect drug delivery.

5. A child with Cystic Fibrosis has a new prescription for Acetylcysteine. Which of the following information should the nurse include in the instructions?

Correct answer: B

Rationale: The correct answer is B: 'Expect this medication to smell like rotten eggs.' Acetylcysteine contains sulfur, which gives it a characteristic rotten-egg odor. This smell is normal and expected when using this medication. Choices A, C, and D are incorrect. Acetylcysteine is not used to suppress cough, cause euphoria, or turn urine orange.

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