If a person is more than 3 hours late taking their tablet or misses taking their tablet on 1 or more days, they should3: Take 1 tablet immediately (as soon as they remember that they missed a dose), then resume taking Opill on their regular schedule Use a condom or other barrier method during intercourse for the next 2 days (48 hours) after restarting Opill, as it takes 2 days for Opill to start working again If a person’s period is late after missing any tablets in the last month, they should take a pregnancy test.3