A nurse is reviewing the laboratory findings for a female client who is taking zidovudine to treat HIV. Which of the following should the nurse identify as an adverse finding associated with this medication?
Neutrophil count 650/mm³ (2,500 to 8,000/mm³).
Platelets 450,000/mm³ (150,000 to 400,000/mm³).
Hgb 17 g/dL (12 to 16 g/dL).
Creatinine 1.5 mg/dL (0.5 to 1 mg/dL).
The Correct Answer is A
Choice A rationale
A neutrophil count of 650/mm³ is significantly lower than the normal range (2,500 to 8,000/mm³) and indicates neutropenia, which is a known adverse effect of zidovudine. Neutropenia increases the risk of infections and requires close monitoring and potential dose adjustment or discontinuation of the medication.
Choice B rationale
A platelet count of 450,000/mm³ is slightly above the normal range (150,000 to 400,000/mm³) but is not typically associated with zidovudine toxicity. Zidovudine is more commonly associated with bone marrow suppression leading to anemia and neutropenia rather than thrombocytosis.
Choice C rationale
An Hgb level of 17 g/dL is above the normal range for females (12 to 16 g/dL) but is not a common adverse effect of zidovudine. Zidovudine is more likely to cause anemia, leading to lower hemoglobin levels rather than elevated levels.
Choice D rationale
A creatinine level of 1.5 mg/dL is within the upper limit of the normal range (0.5 to 1 mg/dL) and is not a typical adverse effect of zidovudine. Zidovudine primarily affects the bone marrow and does not have a significant impact on renal function.
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Correct Answer is B
Explanation
Choice A rationale
Crushing tadalafil is not recommended as it can alter the medication’s effectiveness and absorption. Tadalafil should be taken whole to ensure proper dosage and efficacy.
Choice B rationale
Tadalafil can decrease blood pressure by relaxing blood vessels, which allows for increased blood flow. This is a known effect of phosphodiesterase type 5 (PDE5) inhibitors like tadalafil.
Choice C rationale
Tadalafil should not be taken more than once a day. Taking it twice a day can increase the risk of side effects and is not recommended.
Choice D rationale
The effects of tadalafil can last up to 36 hours, not just 4 hours. This prolonged duration is one of the reasons it is preferred by some patients.
Correct Answer is E
Explanation
Choice A rationale
Hypercalcemia is not typically a risk in the emergency department unless the patient has a specific condition that causes elevated calcium levels.
Choice B rationale
Hypotension can occur in the emergency department, especially in cases of shock or severe dehydration, but it is not the most common risk.
Choice C rationale
Hypokalemia can occur, particularly in patients with certain medical conditions or those taking diuretics, but it is not the most common risk.
Choice D rationale
Hypernatremia can occur, especially in patients with dehydration or certain medical conditions, but it is not the most common risk.
Choice E rationale
Hypoglycemia is a common risk in the emergency department, especially in patients with diabetes or those who have not eaten for an extended period.