EMEND increased the AUC of midazolam, a sensitive CYP3A4 substrate, 2.3-fold on Day 1 and 3.3- fold on Day 5, when a single oral dose of 2 mg midazolam was co-administered on Days 1 and 5 of a regimen of EMEND 125 mg on Day 1 and 80 mg/ day on Days 2 to 5.