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 is receiving IV Dopamine for the treatment of shock. Which of the following findings indicates that the medication is effective?

Correct answer: C

Rationale: The correct answer is increased urine output. Dopamine increases cardiac output and improves renal perfusion, leading to increased urine output. This response indicates that the medication is effective in treating shock by enhancing renal function and perfusion. Choices A, B, and D are incorrect because an increased heart rate, decreased blood pressure, and decreased respiratory rate are not findings that indicate the effectiveness of IV Dopamine in treating shock.

3. A client has a new prescription for Verapamil to control hypertension. Which of the following instructions should the nurse include?

Correct answer: A

Rationale: Increasing dietary fiber intake is essential when taking Verapamil to prevent constipation, a common adverse effect of this medication. Verapamil is a calcium channel blocker used to treat hypertension, and dietary fiber helps maintain bowel regularity and prevent constipation that may occur as a side effect of the medication.

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

Correct answer: B

Rationale: The correct instruction for the nurse to include is to advise the client to avoid salt substitutes. Salt substitutes often contain potassium, and captopril can cause hyperkalemia. By avoiding salt substitutes, the client can prevent elevated potassium levels and associated complications.

5. A client is prescribed Digoxin. Which of the following findings should the nurse monitor as a sign of potential toxicity?

Correct answer: A

Rationale: Bradycardia is a common sign of Digoxin toxicity. Digoxin can lead to toxicity, which can manifest as various signs and symptoms, including bradycardia. Monitoring the client's heart rate closely is crucial to detect and manage potential toxicity early. Hypertension, hyperglycemia, and hypocalcemia are not typically associated with Digoxin toxicity; therefore, they are incorrect choices.

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