Drug Interaction Report

GENERALLY AVOID: Coadministration with H2-receptor antagonists or other agents that reduce stomach acid (e.g., proton pump inhibitors) may decrease the oral absorption and plasma concentrations of cefditoren pivoxil. According to the manufacturer, a single intravenous dose of famotidine (20 mg) reduced the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of a single dose of cefditoren pivoxil (400 mg, administered following a meal) by 27% and 22%, respectively. The clinical significance of these alterations is unknown.

MANAGEMENT: The manufacturer recommends that cefditoren pivoxil not be administered concomitantly with H2-receptor antagonists or other agents that reduce stomach acid.

ADJUST DOSING INTERVAL: Food enhances the oral absorption and bioavailability of cefditoren pivoxil. According to the manufacturer, administration of cefditoren pivoxil following a high-fat meal increased the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) by 50% and 70%, respectively, compared to administration in the fasting state. The absolute bioavailability of cefditoren pivoxil is approximately 14% under fasting conditions and 16% when given with a low-fat meal.

MANAGEMENT: To ensure maximal oral absorption, cefditoren pivoxil should be administered with or immediately after a meal.