A patient who is HIV-positive has been receiving medication therapy that includes zidovudine.
The prescriber has decided to stop the zidovudine due to its dose-limiting adverse effect.
Which of these conditions is the dose-limiting adverse effect of zidovudine therapy?
Bone marrow suppression
Retinitis
Renal toxicity
Hepatotoxicity
The Correct Answer is A
Choice A rationale:
Zidovudine, also known as AZT, is a medication used for the treatment of human immunodeficiency virus (HIV) infection. One of the major dose-limiting toxic effects of Zidovudine is hematologic toxicity, which manifests clinically as anemia, neutropenia, and sometimes as platelet deficits with onset after several weeks of treatment. This hematologic toxicity is essentially a form of bone marrow suppression. Therefore, bone marrow suppression is the dose-limiting adverse effect of zidovudine therapy.
Choice B rationale:
Retinitis is not a known dose-limiting adverse effect of zidovudine. While zidovudine has a range of side effects, retinitis is not commonly associated with its use.
Choice C rationale:
Renal toxicity is not a known dose-limiting adverse effect of zidovudine. While zidovudine can have various side effects, renal toxicity is not typically one of them.
Choice D rationale:
Hepatotoxicity is not the dose-limiting adverse effect of zidovudine. While severe hepatomegaly with steatosis, including fatal cases, have been reported with the use of zidovudine, it is not considered the dose-limiting adverse effect. The dose-limiting adverse effect is more specifically related to hematologic toxicity, which includes bone marrow suppression.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["2"]
Explanation
Let’s solve the medication math problem step by step:
Step 1: Identify the total daily dose of amoxicillin. The total daily dose is 2 gm/day.
Step 2: Convert the total daily dose from grams to milligrams, as the available medication is in milligrams. We know that 1 gm = 1000 mg, so 2 gm = 2000 mg.
Step 3: The total daily dose is divided into two doses. So, each dose will be 2000 mg ÷ 2 = 1000 mg.
Step 4: Determine the number of tablets for each dose. Each tablet contains 500 mg of amoxicillin. So, the number of tablets for each dose is 1000 mg ÷ 500 mg/tablet = 2 tablets.
So, the nurse should administer 2 tablets of amoxicillin with each dose.
Correct Answer is ["A","C","D"]
Explanation
Choice A rationale:
A WBC count of 16,000/mm is higher than the normal range of 5,000 to 10,000 cells/mm. This indicates that the body is fighting an infection, which is a common reason for prescribing Vancomycin. Therefore, a high WBC count could indicate a therapeutic response to the medication as it suggests that the body’s immune system is actively fighting the infection.
Choice B rationale:
A BUN level of 42 mg/dl is higher than the normal range of 7 to 20 mg/dL3456. Elevated BUN levels can indicate kidney damage or disease, which is not a desired therapeutic response to Vancomycin. Vancomycin can be nephrotoxic, and its use requires careful monitoring of kidney function. Therefore, a high BUN level does not indicate a therapeutic response to the medication. Choice C rationale:
A blood pressure reading of 95/64 is considered normal. Maintaining normal blood pressure is important for overall health and can indicate that the patient’s body is responding well to the medication. Therefore, a blood pressure reading within the normal range could indicate a therapeutic response to Vancomycin.
Choice D rationale:
A body temperature of 101.8F is considered a fever14. Fever is a common response to infection and can indicate that the body is fighting off an infection, which is a common reason for prescribing Vancomycin. Therefore, a high body temperature could indicate a therapeutic response to the medication as it suggests that the body’s immune system is actively fighting the infection.
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