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 alendronate to treat osteoporosis. Which of the following instructions should be included?

Correct answer: B

Rationale: Alendronate should be taken first thing in the morning on an empty stomach to maximize absorption. Taking it with food, milk, or meals can reduce its effectiveness by impairing absorption. Therefore, advising the client to take it on an empty stomach is crucial for optimal therapeutic outcomes.

3. A client is starting a course of Metronidazole to treat an infection. For which of the following adverse effects should the client stop taking Metronidazole and notify the provider?

Correct answer: C

Rationale: The correct answer is C, 'Ataxia.' Ataxia is a sign of central nervous system (CNS) toxicity, which can be a severe adverse effect of Metronidazole. Metallic taste and nausea are common side effects of Metronidazole but do not require stopping the medication unless they persist or worsen. Dark-colored urine is not typically associated with Metronidazole and does not indicate a severe adverse effect.

4. A client with breast cancer is being taught by a nurse about the adverse effects of chemotherapy. Which of the following statements should the nurse include?

Correct answer: A

Rationale: The nurse should instruct the client to use a soft-bristled toothbrush to prevent bleeding, which can occur due to chemotherapy-induced thrombocytopenia. Chemotherapy can decrease platelet counts, leading to an increased risk of bleeding. Using a soft-bristled toothbrush can help prevent gum bleeding and oral trauma. Choices B, C, and D are incorrect. Avoiding contact with individuals who recently received live virus vaccines is crucial to prevent infections in immunocompromised clients. Aspirin should be avoided due to its blood-thinning effects that can increase the risk of bleeding. A diet low in protein is not recommended as cancer clients often require adequate protein intake for healing and recovery.

5. A client has a new prescription for Captopril for hypertension. The nurse should monitor the client for which of the following adverse effects of this medication?

Correct answer: C

Rationale: Neutropenia is a serious adverse effect associated with ACE inhibitors like Captopril. Neutropenia refers to a decreased level of neutrophils, which are important white blood cells in fighting infection. Monitoring the client's complete blood count (CBC) is essential to detect neutropenia early. Hypokalemia (Choice A) is more commonly associated with diuretics, not ACE inhibitors. Hypernatremia (Choice B) is an increase in sodium levels, not typically caused by Captopril. Bradycardia (Choice D) is not a common adverse effect of ACE inhibitors like Captopril.

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