Dr will say one week likely, but to be absolutely sure you won't get pregnant, take all 21 active pills correctly and in order at exactly 24 hour intervals and then you are safe, even when you are on the inactives or your period. It is not uncommon to skip a period or have it be really light,even if you have taken all 21 actives correctly, you are safe, be sure to start your next pack on time.
- Ortho Tri-Cyclen Information for Consumers
- Ortho Tri-Cyclen Information for Healthcare Professionals (includes dosage details)
- Side Effects of Ortho Tri-Cyclen (detailed)
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