Final answer:
The nurse will question the use of a fluoroquinolone antibiotic in a patient already prescribed amiodarone.
Step-by-step explanation:
The nurse will question the use of a fluoroquinolone antibiotic in a patient already prescribed amiodarone.
Fluoroquinolones, such as ciprofloxacin and levofloxacin, inhibit the activity of DNA gyrase, which is essential for bacterial DNA replication. Amiodarone is known to prolong the QT interval, which can increase the risk of developing an irregular heart rhythm.
Therefore, combining amiodarone with a fluoroquinolone antibiotic can further increase the risk of QT interval prolongation and potentially lead to a life-threatening arrhythmia.