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 a new prescription for clonidine to treat hypertension. Which of the following instructions should the nurse include?

Correct answer: C

Rationale: The correct instruction for a client starting clonidine therapy for hypertension is to avoid driving until their reaction to the medication is known. Clonidine can cause drowsiness, so it is important for the client to refrain from activities that require alertness until they are aware of how the medication affects them. Choice A is incorrect because a rash is not a common side effect of clonidine. Choice B is incorrect as increased salivation is not an expected side effect of clonidine. Choice D is also incorrect as dry mouth is a common side effect of clonidine, but it is not a reason to stop the medication unless severe or bothersome. Therefore, the priority instruction for the nurse to include is to advise the client to avoid driving until their reaction to the medication is known to ensure safety.

3. A nurse is teaching a client who has a new prescription for Atenolol. Which of the following adverse effects should the nurse instruct the client to monitor?

Correct answer: C

Rationale: Atenolol is a beta-blocker that can cause bradycardia as an adverse effect. The client should monitor their pulse regularly and report any significant decreases.

4. Which of the following is not a common effect of Midazolam?

Correct answer: D

Rationale: Midazolam is a benzodiazepine commonly used for its sedative, anxiolytic, and amnestic effects. While dizziness can be a side effect of Midazolam, it is not a primary or common effect. Therefore, the correct answer is D, as it deviates from the typical effects associated with Midazolam.

5. When admitting a client and completing a preassessment before administering medications, which of the following data should the nurse include? (Select all that apply.)

Correct answer: A

Rationale: The correct answer is A, 'Use of herbal teas.' The nurse should inquire about the client's use of herbal teas because they often contain caffeine, which can impact medication biotransformation. This information is crucial to ensure the safe and effective administration of medications and to prevent potential drug interactions. Choice B, 'Daily fluid intake,' while important for overall assessment, is not directly related to medication administration. Choice C, 'Current health status,' is essential but not specific to medication administration preassessment. Choice D, 'Previous surgical history,' although relevant for a client's medical history, is not directly linked to medication administration preassessment.

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