Drug Interaction Report

ADJUST DOSE: Coadministration with potent inhibitors of CYP450 3A4 may significantly increase the plasma concentrations of atogepant, which is primarily metabolized by the isoenzyme. When atogepant was administered with the potent CYP450 3A4 inhibitor itraconazole in healthy study subjects, atogepant peak plasma concentration (Cmax) and systemic exposure (AUC) increased by approximately 2.2- and 5.5-fold, respectively.

MANAGEMENT: The recommended dosage of atogepant is 10 mg once daily when used concomitantly with potent CYP450 3A4 inhibitors.

Food enhances the oral absorption and bioavailability of tenofovir, the active entity of tenofovir disoproxil fumarate. According to the product labeling, administration of the drug following a high-fat meal increased the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of tenofovir by approximately 14% and 40%, respectively, compared to administration in the fasting state. However, administration with a light meal did not significantly affect the pharmacokinetics of tenofovir compared to administration in the fasting state. Food delays the time to reach tenofovir Cmax by approximately 1 hour. Tenofovir disoproxil fumarate may be administered without regard to meals.