I take ortho tri cyclen lo and have been on it successfully for almost a year.
Recently, my stepsister, on the same medication, took her pill a few hours after her normal time (ortho lo is supposed to be taken at the same time each day) and got pregnant.
I have only missed a few pills in a year and am careful to use a condom when I do.
How big of a time window (minutes, hours?) do I have after my usual time before I should use a backup? Am I okay taking the pill within the hour? I can't seem to find this information anywhere.
Thanks!