Antibotics and birth control

Patient

Q: I just started taking Ortho Tri-Cyclen, but two days before i started my birth control pack i had taken one 250mg pill of tetracycline(for acne). but i stopped after i took it because i remembered it might react with birth control and i needed to start my pill. I've been taking the pill for 12 days now, but i'm not sure if it's safe to have sex without a backup. how long will it take for my birth control to be effective if i had only taken the one tetracycline pill 12 days ago?

Doctor

A:   This question is currently in queue and will be answered shortly by one of our doctors. In the meantime you may browse our library of answered questions by clicking here.

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