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A member asked:
Im on b.c pills but i had to take antibiotics for 1 week. the week i took them was the week of my expected period. how long do i wait 4 my b.c to work?
A doctor has provided 1 answer
30 days: Good rule of thumb is to wait an entire 30 day cycle before expecting the best birth control efficacy.
Answered 4/1/2014
4.3k views
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