The nurse is caring for a patient diagnosed with unstable angina who is prescribed metoprolol. The patient asks the nurse, "Why do I have to take this medication?" What response by the nurse is most accurate?
"This medication will decrease how hard your heart works."
"It is prescribed to dilate your coronary arteries."
"It will prevent any irregular heartbeats."
"This medication makes your heart beat more forcefully."
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. While taking some medications with food or milk can help with absorption, this is not a specific requirement for lisinopril.
B. Lisinopril, an ACE inhibitor, can lead to elevated potassium levels. Periodic monitoring of potassium levels is essential to prevent hyperkalemia, a potentially dangerous side effect.
C. Increasing intake of green vegetables is generally healthy but does not directly impact lisinopril's effects.
D. Many salt substitutes contain potassium, which could elevate potassium levels further when taken with ACE inhibitors like lisinopril, posing a risk for hyperkalemia.
Correct Answer is ["1.3"]
Explanation
To calculate the dosage of clindamycin, first convert the patient's weight from pounds to kilograms, knowing that 1 kg equals 2.2 lbs. The patient weighs 88 lbs, which is equivalent to 40 kg (88 lbs / 2.2 lbs per kg). The prescribed dose is 10 mg/kg/day, so the patient requires 400 mg/day (10 mg/kg * 40 kg). Since the medication is to be administered in two divided doses, each dose will be half of the daily requirement, resulting in 200 mg per dose. The medication is supplied at a concentration of 150 mg/mL, so to find out how many milliliters per dose, divide the dose in milligrams by the concentration: 200 mg / 150 mg/mL, which equals 1.33 mL. Rounded to the nearest tenth, the nurse will administer 1.3 mL per dose.
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