Drug Interaction Report

MONITOR: Coadministration with inducers of CYP450 3A4 and/or P-glycoprotein (P-gp) may decrease the plasma concentrations of elagolix, which is a substrate of both the metabolic isoenzyme and efflux transporter. The interaction has not been evaluated in pharmacokinetic studies.

MANAGEMENT: The potential for diminished pharmacologic effects of elagolix should be considered during coadministration with CYP450 3A4 and/or P-gp inducers. Alternative treatments or a dose adjustment of elagolix may be required if an interaction is suspected.

Administration with food may delay the absorption of modafinil (the racemate) and armodafinil (the R-enantiomer) without significantly affecting their overall bioavailability. According to the product labeling, modafinil's absorption may be delayed by approximately one hour if taken with food. Similarly, the time to reach peak plasma concentration (Tmax) of armodafinil may be delayed by approximately 2 to 4 hours in the fed state.