A physician prescribes Vancomycin 20 mg/kg intravenous (IV). The patient weighs 110 lbs. The medication is available in vials which contain 500 mg per 8 mL. What should the nurse withdraw from the vial? (round to the nearest whole number)
The Correct Answer is ["16"]
To calculate the dosage of Vancomycin, first convert the patient's weight from pounds to kilograms, knowing that 1 kg equals 2.2 lbs. The patient weighs 110 lbs, which is equivalent to 50 kg (110 lbs / 2.2). Next, multiply the patient's weight in kilograms by the prescribed dosage of 20 mg/kg, resulting in a total dosage of 1000 mg (50 kg * 20 mg/kg). Since the vials contain 500 mg per 8 mL, divide the total dosage required by the amount per vial to find out how many milliliters should be withdrawn. This results in 16 mL (1000 mg / (500 mg/8 mL)).
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Correct Answer is C
Explanation
A. Discussing over-the-counter drugs with the healthcare provider is essential, as they can interact with antiepileptic medications.
B. Discontinuing antiepileptic medications abruptly can lead to rebound seizures and is unsafe, so this statement is correct.
C. Doubling up on doses can lead to toxicity and adverse effects; missed doses should not be made up by doubling the next dose. This response indicates the need for further teaching.
D. Taking medications exactly as prescribed is necessary to maintain therapeutic levels and manage seizure control effectively.
Correct Answer is A
Explanation
A. Metoprolol, a beta-blocker, decreases the heart rate and reduces myocardial oxygen demand by lowering the workload on the heart, which is beneficial for managing unstable angina.
B. While metoprolol has some vasodilatory effects, its primary action is to reduce heart workload, not to dilate coronary arteries.
C. Although beta-blockers can reduce the risk of arrhythmias, the main purpose in angina management is to decrease cardiac workload.
D. Metoprolol does not make the heart beat more forcefully; instead, it decreases the force of contraction to reduce myocardial oxygen consumption.
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