Minor
Suspected
Mô tả
Azithromycin is a weak CYP3A4 inhibitor that can modestly raise loratadine plasma levels; the clinical impact is minimal given loratadine's wide therapeutic index and low cardiac risk.
Cơ chế
Azithromycin inhibits CYP3A4 to a minor degree, reducing hepatic metabolism of loratadine; azithromycin itself carries a small QT-prolonging potential, creating a theoretical additive cardiac risk.
Ý nghĩa lâm sàng
No significant QT changes or adverse events are expected at standard doses in patients without underlying cardiac risk factors.
Xử trí
No dose adjustment required; exercise caution in patients with QT prolongation risk factors or electrolyte abnormalities.