The nurse is caring for a patient who is prescribed azithromycin for a respiratory infection.The nurse should assess the patient's medical history for any past or current conditions related to:

Choice A rationaleAzithromycin can prolong the QT interval, leading to potential cardiac arrhythmias. Patients with a history of prolonged QT interval or other heart conditions should be monitored closely.Choice B rationaleConstipation is not commonly associated with azithromycin use. Gastrointestinal side effects may include diarrhea or nausea but not constipation.Choice C rationaleWhile tachycardia can be a side effect of some medications, azithromycin is more commonly associated with QT prolongation rather than causing increased heart rate directly.Choice D rationaleHyperkalemia is not typically a concern with azithromycin. Electrolyte imbalances are not a common side effect of this antibiotic.