คำอธิบาย
Both azithromycin and ciprofloxacin prolong the QT interval; concurrent or overlapping use significantly increases torsades de pointes risk.
กลไก
Both drugs inhibit cardiac hERG potassium channels; additive IKr blockade prolongs ventricular repolarization beyond what either agent causes alone.
ความสำคัญทางคลินิก
The combination of two QT-prolonging antibiotics is particularly risky in patients with hypokalemia or structural heart disease.
การจัดการ
Avoid concurrent use; select antibiotics with complementary spectra but non-overlapping QT risk; monitor ECG if co-administration is necessary.
ข้อจำกัดความรับผิดชอบทางการแพทย์
This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making medication decisions.