Drug Interaction Report

Coadministration with potent inhibitors of CYP450 3A4 may increase the plasma concentrations of lazertinib. To examine this interaction, healthy adult participants (n=16) received lazertinib (160 mg) on day 1, then the potent CYP450 3A4 inhibitor itraconazole (200 mg) daily on days 8 to 16. On day 12, the participants received another single dose of lazertinib (160 mg). Concomitant use of itraconazole increased lazertinib's peak plasma concentration (Cmax) and systemic exposure (AUC) by 1.2- and 1.5-fold, respectively. The clinical significance of these changes is unknown.

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.