क्लैरिथ्रोमाइसिन और क्विनीन का इंटरैक्शन

The use of macrolide antibiotics such as erythromycin should be avoided in patients receiving quinine sulfate.

Therefore, concomitant administration of macrolide antibiotics such as erythromycin or troleandomycin with quinine sulfate should be avoided [see WARNINGS AND PRECAUTIONS ( 5.3 )] .

Although a causal relationship between a specific drug and the arrhythmia was not established in this case, erythromycin is a CYP3A4 inhibitor and has been shown to increase quinine plasma levels when used concomitantly.

A related macrolide antibiotic, troleandomycin, has also been shown to increase quinine exposure in a pharmacokinetic study [see DRUG INTERACTIONS ( 7.1 )] .

Ketoconazole (CYP3A4 Inhibitor) In a crossover study, healthy subjects (N=9) who received a single oral dose of quinine hydrochloride (500 mg) concomitantly with ketoconazole (100 mg twice daily for 3 days) had a mean quinine AUC that was higher by 45% and a mean oral clearance of quinine that was 31% lower than after receiving quinine alone.