In another study, single doses of an oral contraceptive containing ethinyl estradiol and norethindrone were administered on Days 1 through 21 withoral aprepitant, given as a regimen of 125 mg on Day 8 and 80 mg/ day on Days 9 and 10 with ondansetron 32 mg intravenously on Day 8 and oral dexamethasone given as 12 mg on Day 8 and 8 mg/ day on Days 9, 10, and 11.