A medical nurse has administered an oral dose of 30 mg nifedipine long-acting to a patient with a diagnosis of angina. What principle should guide the nurse's follow-up assessment after administering this drug?
A) Nifedipine has the potential to induce prodysrhythmic effects.
B) Nifedipine does not affect heart rate, so assessment after administration is not normally necessary.
C) The patient's heart rate will be at its lowest approximately 45 minutes to 1 hour after oral administration of nifedipine.
D) The patient's blood pressure, heart rate, and oxygen saturation level should be assessed 30 minutes after administration of nifedipine.
B
Feedback:
Nifedipine inhibits the influx of calcium entering through slow channels, producing vasodilation of the peripheral blood vessels and coronary arteries. However, the drug has a minimal effect on the sinoatrial and atrioventricular nodes. Therefore, it does not affect the heart rate.
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