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 who takes Chlorpromazine for the treatment of Schizophrenia is due for a follow-up assessment. The nurse should expect the greatest improvement in which of the following manifestations? (Select all that apply.)

Correct answer: A

Rationale: When a client takes a conventional antipsychotic medication like chlorpromazine, the greatest improvement is typically seen in positive symptoms such as disorganized speech. These medications are more effective in managing positive symptoms like disorganized speech rather than negative symptoms like impaired social interactions or hallucinations. Therefore, the nurse should anticipate improvement in disorganized speech as a positive response to chlorpromazine treatment.

3. A client who has been taking prednisone to treat asthma is advised to discontinue the medication. The client should be instructed to reduce the dose gradually to prevent which of the following adverse effects?

Correct answer: B

Rationale: Abruptly stopping prednisone can result in adrenocortical insufficiency due to suppression of the adrenal glands. Gradually tapering the dose helps the body adjust and resume its natural cortisol production, preventing adrenal insufficiency. Choice A, hyperglycemia, is a possible adverse effect of prednisone, but it is not the primary reason for gradual tapering. Severe dehydration (Choice C) and rebound pulmonary congestion (Choice D) are not typically associated with discontinuing prednisone.

4. A client with chronic Neutropenia is receiving Filgrastim. What action should the nurse take to assess for an adverse effect of filgrastim?

Correct answer: A

Rationale: Bone pain is a known adverse effect of Filgrastim, which is dose-related. By assessing for bone pain, the nurse can monitor for this common side effect. Acetaminophen and, if necessary, an opioid analgesic can be used to manage the bone pain associated with Filgrastim. Assessing for right lower quadrant pain, crackles in the bases of the lungs, or heart murmurs would not directly relate to the adverse effects of Filgrastim in a client with chronic Neutropenia.

5. A client has a new prescription for Metoprolol to treat hypertension. Which of the following instructions should the nurse include?

Correct answer: C

Rationale: The correct instruction for a client taking Metoprolol, a medication used to treat hypertension, is to avoid sudden changes in position. Metoprolol can cause orthostatic hypotension, a sudden drop in blood pressure when moving from lying down to standing up, leading to dizziness and falls. By advising the client to change positions slowly, the nurse helps prevent these adverse effects and promotes safety.

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