what does it mean when a medication has a half life
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Nursing Elites

ATI RN

ATI Proctored Pharmacology 2023

1. What does it mean when a medication has a half-life?

Correct answer: B

Rationale: When a medication has a half-life, it refers to the time it takes for half of the dose to be eliminated from the bloodstream. This parameter is crucial in understanding the duration of action and dosing intervals for medications in clinical practice. Choice A is incorrect as the half-life is not about how long the medication lasts but about elimination from the body. Choice C is incorrect because the half-life is not about the peak effectiveness of the medicine. Choice D is incorrect as it does not accurately define the concept of half-life.

2. A client has a new prescription for Buspirone to treat Anxiety. Which of the following information should the nurse include?

Correct answer: D

Rationale: The nurse should educate the client that Buspirone has a low risk for physical or psychological dependence or tolerance. This information is crucial for the client to understand the medication's safety profile and potential risks associated with long-term use.

3. A client in a substance abuse clinic is being assessed by a nurse after discontinuing disulfiram due to severe nausea and vomiting. What is the likely cause of the client's distress?

Correct answer: C

Rationale: Disulfiram, when combined with alcohol, leads to a severe reaction causing nausea and vomiting. Since the client experienced these symptoms after starting disulfiram, it is likely that they consumed alcohol while taking the medication. Choice A is incorrect because the symptoms are more indicative of the interaction with alcohol rather than an allergic response. Choice B is incorrect as severe nausea and vomiting are not common side effects of disulfiram alone. Choice D is incorrect as there is no indication of an overdose based on the symptoms described.

4. What is the therapeutic action of Phenytoin?

Correct answer: B

Rationale: Phenytoin is primarily used as an anticonvulsant to prevent and control seizures. It works by stabilizing electrical activity in the brain, making it effective in managing conditions like epilepsy. Antidiabetic medications are used to regulate blood sugar levels, mood stabilizers help manage mood disorders, and antianxiety agents are used to reduce anxiety symptoms, none of which are the primary therapeutic action of Phenytoin.

5. When educating a client prescribed Rifampin, which instruction should the nurse provide?

Correct answer: A

Rationale: The correct instruction for a client prescribed Rifampin is to expect orange discoloration of urine. Rifampin is known to cause harmless discoloration of bodily fluids, including urine, which is a common side effect of this medication. It is important for the nurse to educate the client about this expected side effect to prevent unnecessary concern or discontinuation of the medication. Choices B, C, and D are incorrect because Rifampin does not require specific dietary considerations like taking it with food or increasing dairy intake. Furthermore, itching is not a common side effect that would necessitate immediate discontinuation of Rifampin.

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